*Audio stereo earphone with built-in Mic for hands-free calling 
*Speaker: 40mm 
*Bluetooth version: V4.1+EDR,  Chipset: CSR8635                  
*Support Bluetooth HSP, HFP, A2DP and AVRCP                   
*RF frequency range: 2.402-2.480GHZ, 2.4G ISM band              *Operating range: 10M                
*Talking time: about 10Hours                                                   
*Music playing time: 8 Hours                                                
*Standby time: 250Hours  
*Battery: 450mA                                                  
Features:                                                                           
* High definition sound
* Premium memory foam & protein earmuffs
*  Soft silicon Headband
* Foldable for portability
* Waterproof and dustproof rubber painting
* Zinc alloy swivel for long life using
* Free detachable audio cable attached
* Powerful 450mA battery for lone working time