V-Trust Inspection Service Co., Ltd

Wide Expertise in the Home Audio &amp; Speakers Industry  V-Trust's inspection services for home audio and speakers provide essential support to buyers, ensuring that products meet customer specifications and quality standards.  Whether it’s home audio systems or standalone speakers, V-Trust’s inspection process carefully examines product integrity, appearance, and build quality to ensure there are no defects like scratches, dents, or loose parts. Functionality checks focus on sound quality, speaker sensitivity, battery performance, and power output, along with total harmonic distortion (THD) and frequency range. Additional tests cover connectivity, including wired and wireless options, Bluetooth pairing, multi-device compatibility and other tests to confirm product reliability.  V-Trust helps buyers minimize risks and avoid costly issues by providing detailed inspection reports, complete with photographic evidence, available within 6 to 24 hours after the inspection.  Why V-Trust  ✔ Full-Time Inspectors Only: We do not hire part-time QC staff or outsource to other firms. This approach serves as a key anti-bribery measure and ensures the highest level of reliability in our inspection reports. ✔ Diverse Product Range: Our team covers a wide range of product categories, including electronics, electrical products, lighting, building materials, furniture, home décor, kitchenware, textiles, apparel, and industrial goods. ✔ 2,500+ Checklists: We offer comprehensive checklists for various product lines, drawing on our extensive QC experience. ✔ Online Booking: Easily book services through our advanced online system, and access inspection results and supply chain statistics via the QC dashboard. ✔ Quick and Efficient Service: Receive same-day quotations, with reports available 6 to 24 hours after inspection. We also offer free laboratory testing and regulatory consultations.  About V-Trust  V-Trust is the largest product inspection company in Asia, employing only full-time inspectors. With over 600 staff across 10 Asian countries, we conduct more than 110,000 inspections and audits annually, serving over 13,000 buyers worldwide.  We are experts in the quality control industry, offering a wide range of cost-effective services, including product inspections, factory audits, laboratory testing, and product certification.  V-Trust operates in China and key export markets such as India, Vietnam, Malaysia, Thailand, Bangladesh, Pakistan, Cambodia, Indonesia, and Myanmar.  For more information, please contact us:Website: www.v-trust.com 

Home Audio & Speakers Product Inspection

Hanhong Digital Technology Co., Limited

With the talented in house designer and the strongest R&amp;D team which leads Hanhong to create the unique and excellent products to worldwide clients, all of our products have our private toolings with design patented, we are expert in making some difference whether on the designs or the acoustic technology so as to bring the good branding value for our customers. Also we have strongest R&amp;D team including the electronic engineers, mechanical engineers, acoustic engineer and software developing engineers who assure the enough capacity of doing customized ODM projects with our customers. 

OEM / ODM FACTORY

Svi Public Co Ltd

Electronic manufacturing service, start from PCBA to Final Assembly. Factories located in Thailand, Austria, Slovakia and Hungary. 	 Audio 	 Medical 	 Telecommunication 	 Industrial 	 Transportation 	 etc.,  

Electronic Manufacturing Service - Audio Equipment

The Hong Kong Standards And Testing Centre Ltd (STC)

We offer radio frequency and electromagnetic testing services for customers. We use high-quality equipment to test and provide precision results. Our services are professional and reliable. Providing technical support services.Assist and strengthen the product modification.To know more or enquire any specific service, please visit https://www.stc.group and fill in our enquiry form on https: www.stc.group/contact. 

Radio Frequency and Electromagnetic Testing

Nemko Hong Kong Limited

Nemko can issue MIC certificaiton for radio and wireless product to get market access to Japan.  Our certification scope covers all radio under the Japan MIC regulation, naming B1, B2, B3. Nemko TCB provide one stop wireless certification for the markes covering EU, US, Japan , Karan, Hong kong and Taiwan. 

Japan MIC Approval

ABO ELECTRONICS (SHENZHEN) CO LTD

Type of productions: SMT,DIP process ICT test Professional engineering staff to provide technical support OEM services are welcome PCB assembly,PCBA,SMT,DIP assembly Profound knowledge of contract manufacturing services Capable of developing effective production process to ensure high quality. ISO 9001:2008;ISO13485 

PCB Design and Assembly

Surface Mount Technology Ltd

 This high-tech machine is designed for advanced pick-and-place and bonding technology. It supports chip mount&nbsp;with the minimum size of 0201 and IC mount with fine pitch in 0.3mm of QFP. The BGA or micro BGA has a diameter of 0.4mm with a 0.8mm pitch or a diameter of 0.3mm ball with 0.5mm pitch CSP. 
 
  Flip Chip Bonding: ACF, C4 and C5 Technology. 
  Aluminum wire bonding. 
 

Pick-and-Place and Bonding Technology

Orion Incorporation Limited

   Platinumised titanium anode is a must for good precious metal electroplating.   Our anodes are in good quality, durable, and easy operation.   Custom designed handle is made easy for operation.  

Platinumised Titanium Anode

Propagation Systems Limited

Propagation offers not just only the design service but also the hardware modules for different application. The qualified modules are suitable for the OEM services as well as the system design. Our OEM partners are located in both Southern part of China and Northern part of Vietnam in over 20 years manufacturing experience.   matter® Connected Things  – Border Router and End NodeBluetooth® Low Energy     – Bluetooth version 5.3Classical Bluetooth® Audio  – customized Bluetooth audio in both DSP and applicationEmbedded WiFi®           – bundle solution with Amazon Wed ServiceUltra Wide Band (UWB)      – RTLS applicationSigfox®/ LoRa®            – Long range transmission up to 1.5km Hardware Design service: Because of our electronics and electrical background, we also provide the hardware design service based in Hong Kong. Propagation completed over 120 projects in the last 10 years.  Application BoardIOT deviceEmbedded Linux / Android Development

Hardware Development

Wide Expertise in the Headphones &amp; Earphones Industry  V-Trust's inspection services for headphones and earphones offer essential support to buyers, ensuring that products meet both customer specifications and quality standards.  Whether it is an order of headphones or earphones, the V-Trust inspection process involves a comprehensive assessment of product integrity, appearance, and build quality to ensure there are no workmanship defects, such as scratches or loose parts. Functionality checks include audio quality, charging and discharging tests, battery performance, frequency response, impedance, microphone clarity, as well as testing wired and wireless connectivity and other factors to verify product reliability.  V-Trust helps buyers minimize risks and avoid costly issues by providing detailed inspection reports with photographic evidence available within 6 to 24 hours after the inspection.  Why V-Trust  ✔ Full-Time Inspectors Only: We do not hire part-time QC staff or outsource to other firms. This approach serves as a key anti-bribery measure and ensures the highest level of reliability in our inspection reports. ✔ Diverse Product Range: Our team covers a wide range of product categories, including electronics, electrical products, lighting, building materials, furniture, home décor, kitchenware, textiles, apparel, and industrial goods. ✔ 2,500+ Checklists: We offer comprehensive checklists for various product lines, drawing on our extensive QC experience. ✔ Online Booking: Easily book services through our advanced online system, and access inspection results and supply chain statistics via the QC dashboard. ✔ Quick and Efficient Service: Receive same-day quotations, with reports available 6 to 24 hours after inspection. We also offer free laboratory testing and regulatory consultations.  About V-Trust  V-Trust is the largest product inspection company in Asia, employing only full-time inspectors. With over 600 staff across 10 Asian countries, we conduct more than 110,000 inspections and audits annually, serving over 13,000 buyers worldwide.  We are experts in the quality control industry, offering a wide range of cost-effective services, including product inspections, factory audits, laboratory testing, and product certification.  V-Trust operates in China and key export markets such as India, Vietnam, Malaysia, Thailand, Bangladesh, Pakistan, Cambodia, Indonesia, and Myanmar.  For more information, please contact us:Website: www.v-trust.comEmail: cs@v-trust.com 

Headphones & Earphones Product Inspection

Daiwa Metal Works Co Ltd

The fabric lightbox combined the aluminum outer shell and the weather-resistant fabric of the illuminated face. Specified and customized graphics are UV inkjet printed on the material, then spring-tensioned into the metal casing, CE approved, and ECA rated LED installed inside. Its structure is simple, and the price is affordable. Fabric light box has even light, larger illuminated area, brighter and better advertising effect than the traditional lightbox, which is suitable for shopping malls, airports or outdoor venues.  √Breathable fabric can reduce the risk of overheating caused by long-term lighting; √Even light, larger illuminated area, brighter and better advertising effect compared with traditional light box; √Energy-saving, brighter and long-life LEDs are used; √Simple structure design withe high-quality aluminum which is easy for installation, maintenance and replacement; √Affordable price.  Materials: Fabric and Aluminum frameMetal Surface: Painted aluminumLED Colors : cool white (6500K)Application: Indoor and outdoor, fit to facades, hang from canopies or bond to walls, for various signs in chain stores, civil engineering site, public facilities, etc.Application (Industries): Government, catering, medical, banks, retail and high-end industry, municipal engineering, shopping malls, etc.Scene Display 1Scene Display 2Detail 1Detail 2 

Single Side Light Box— Fabric Face Light Box

Sun Wing Technology Co

   We provide electroplating service.   Different kinds of electroplating available such as 16K, 18K &amp; 23K micron gold; Swiss color standard including 1N, 2N, 3N, rose gold; micron palladium, PNP, silver; black ruthenium, rhodium, gun color, titanium color; antique red, white &amp; green copper, antique silver, CSP, full color and transparent elecoat, etc.  

Electroplating Service

Heraeus Metals Hong Kong Limited

Our recycling business unit in Hong Kong is a major player serving the Asia Pacific market, and takes full advantage of the territory's unique position as a free port to establish a logistic hub and close proximity to Asian countries. It is fully equipped to efficiently extract precious metals from almost any grade of concentrates, alloys, residues, scraps and sweeps containing gold, silver, platinum and palladium. By using state-of-the-art techniques and continuously investing in new technology, we offer high yields and short processing times. The key markets that we serve are the jewelry, electronics, semiconductor, mining and surface finishing industries.
 
  The London Bullion Market Association (LBMA) acceptable refiner for gold. 
  The London Bullion Market Association (LBMA) acceptable refiner for silver. 
 

Precious Metal Refining

Ching Luen Printing Co Ltd

 Highlighted is a prepress service flaunting excellent and closely monitored processes like color separation. The service features the adoption of computer to plate (CTP) system and a set of color plate making systems from Apple computers. Various advanced imaging and printing equipment is used to ensure the highest prepress quality. Highly efficient.Well-trained professional personnel.

Prepress Service

We focus on long-term business development and provide reliable and perfect services to customers, besides existing 9 mature production lines (including the SMT, DIP, FAT and other process lines). We plan to increase 8 more SMT lines, 2-4 more DIP lines, 3-4 more final assembly lines step by step. The PCBA annual production capacity will reach to 50KK pieces, and the final assembly annual production capacity will reach to 20KK units. Surface mount technology (SMT).Professional and reliable.

PCBA SMT

 Our research and development service focuses on switching-mode power and micro controller. We produce standard-design products with high quality, function, and precision. We also engage in providing tailor-designed electronic solutions and upgrade of OEM products. 
 
  Structured systems for great efficiency. 
  With advanced facilities and equipments. 
 

Research and Development

 STC is the first non-governmental laboratory in Hong Kong to receive accreditation from Certification and Accreditation Administration of the People’s Republic of China(CNCA) to provide comprehensive ChinaCompulsory Certification (CCC) testing services.  Our laboratory in Dongguan, is the first non-government organization in China to obtain designated CCC testing laboratory status providing full scope CCC toy testing services and CCC testing services for information technology equipment, lighting products and audio-visual equipment.     STC provides one-stop CCC and support services from application and document preparation to type testing and factory inspection to meet all local and oversea CCC needs.  Audio-Visual Apparatus (GB 8898-2011, GB/T 13837-2012, GB 17625.1-2012) Audio-visual equipmentAudio power amplifiersVarious optical disc playback and processing equipmentRadio receiver for various broadcasting frequencies Combination speakersIf you have any further question, please feel free contact us or visit our website: https://www.stc.group/en/contact To know more or enquire any specific service, please visit https://www.stc.group and fill in our enquiry form on https: www.stc.group/contact. 

CCC China Compulsory Certificate for Audio

We provide fully turn-key solutions that integrate innovative EMS products with quality manufacturing. Our industry focus includes industrial products, high end telecommunications, office automation, professional audio and video products, automotive electronics, medical devices, etc. The advanced solutions are sure to keep you on the cutting edge.
 
  Covering a wide industry. 
  Experienced in this field. 
 

EMS Turn-Key

With over 50 years of experience, STC has been a leader in EMC testing and is a&nbsp;Local Certified Body (LCB) under the&nbsp;Office of the Communications Authority (OFCA)&nbsp;of the Hong Kong Government. Our state-of-the-art laboratory, RF and EMC testing chambers allow for ElectroMagnetic Interference (EMI) and ElectroMagnetic Susceptibility (EMS) testing, as well as RF testing for radio frequency products.

STC&rsquo;s EMC testing and RF testing capabilities are recognized and comply with internationally standards to help manufacturers, retailers and importers meet regulatory requirements and quickly get products to international markets.

  Radio Frequency (RF)&nbsp;Testing   	 American RF Standards&nbsp;(ANSI C63.10, 47 CFR Part 15) 	 Australian RF Standard&nbsp;(AS/NZS 4268) 	 Canadian RF Standards&nbsp;(RSS-Gen, RSS-210, RSS-220, RSS-222, RSS-247, RSS-310) 	 European RF Standards&nbsp;(EN 300086, EN 300113, EN 300220, EN 300296, EN 300328,EN 300330, EN 300390, EN 300422, EN 300440,&nbsp;EN 301166, EN 301178, EN 301357, EN 301559,&nbsp;EN 301893,EN 302018,&nbsp;EN 302065, EN 302195,&nbsp;EN 302208, EN 302502, EN 302536, EN 302608, EN 302609, EN 303203, EN 303204, EN 303406,EN 303354) 	 Hong Kong Radio Specifications&nbsp;(HKCA 10XX)  If you have any further question, please feel free contact us at&nbsp; enquiry@stc.group &nbsp;or visit our website:&nbsp; https://www.stc.group/en/contact 

Radio Frequency (RF) Testing

Electronic Manufacturing Service
Our industry focus includes industrial products, high end telecommunications, office automation, professional audio and video products, automotive electronics, medical devices, etc. The advanced solutions are sure to keep you on the cutting edge.

Electronic Manufacturing Service

STEP HERO INTERNATIONAL LIMITED

Highlighted is a prepress service&nbsp;flaunting excellent and closely monitored processes like color separation. The service features the&nbsp;adoption of&nbsp;computer to plate (CTP) system and a set of color plate making systems from&nbsp;Apple computers.&nbsp;Various advanced imaging and printing equipment&nbsp;is used to ensure the highest prepress quality.&nbsp;

 
  Highly efficient.&nbsp; 
  Well-trained&nbsp;professional personnel.&nbsp; 
 

Nemko offer expert testing various electrical vehicle charging connector, inlet and socket according to standards IEC 61296 series, and issue CB, and N mark certificate to demonstrate compliance.  

Testing of ELVH charging connector

STC offer Electromagnetic Compatibility (EMC) Testing services for medical devices such as: Medical Electrical EquipmentIn Vitro Diagnosis (IVD) Medical EquipmentElectromagnetic Compatibility Testing (EMC) IEC / EN 60601-1-2CISPR 11 / EN 55011IEC / EN 61326-1IEC / EN 61326-2-6FCC Part 15 / Part 18ICES-001 / ICES-003 Radio Frequency Testing (RF) EN 300330-1; EN 300330-2 (9 kHz to 30 MHz)EN 300220-1; EN 300220-2 (25 MHz to 1000 MHz)EN 300440-1; EN 300440-2 (1 GHz to 40 GHz)FCC Part 15 / Part 18; RSS-210Bluetooth EN 300328 (2.4 GHz)FCC Part 15 / Part 18RSS-247Wi-Fi EN 300328 (2.4 GHz TRx WiFi b / g / n)EN 301893 (5.8 GHz)FCC Part 15 / Part 18RSS-247If you have any further question, please feel free contact us or visit our website: https://www.stc.group/en/contacTo know more or enquire any specific service, please visit https://www.stc.group and fill in our enquiry form on https: www.stc.group/contact.  

Electromagnetic Compatibility for Medical Devices

Radio frequency and electromagnetic compatibility (EMC) Testing: The EMC testing service reveals the performance of your products in electromagnetic conditions.Conducting RF testing, electromagnetic compatibility testing (i.e. electromagnetic interference &amp; electromagnetic susceptibility) in accordance to standards of Australia, Canada, China, Europe, Hong Kong, Japan, Kuwait, Korea, New Zealand, Saudi Arabia, the United States, etc.Providing technical support services.Assisting customers on product modification in order to meet stringent standards of various countries.The international certifications that we can assist customers to obtain, and accreditation/recognition that we have gained: (Europe) CE, RTTE Certification; (Germany) DAkkS; (USA) FCC, TCB; (Canada) IC; (China) CNAS; (Australia/New Zealand) C-Tick; (Japan) VCCI; (Hong Kong) HKSI.To know more or enquire any specific service, please visit https://www.stc.group and fill in our enquiry form on https: www.stc.group/contact. 

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