1. Brief description of bluetooth and electronic solutions

• Bluetooth version: Conwise 5.0
• Support Profile: A2DP V1.3, ACRCP V1.4, HFP V1.6
• Decoding the format: MP3/mav
• Transmission Range (Hz)

2. 402~2.4800GHz unlicensed ISM band

• Sensitive: -86dBm@<0.1%BER
• Transmission distance: Up to10M(Outdoor operating space)
• Pair Name: SDH-A3
• Reset button: Behind AUX

3、Microphone parameters
Specification

• Reference value
• Microphone Unit: 4015   4015L=25MM-4520 
• Mic Directivity:
• Omnidirectional
• S.P.L: -42dB(3V,2.2KΩ；0dB=1V/Pa,1KHz)
• Impedance: 2.2KΩ / No less than 2.2KΩ
• Operating voltage: 2.2v
• Max.Input Sound Pressure Level: 110dB
• Current Consumption:＜0.5mA 
• S/N Ratio: More than 58dB
• Standard Operation Voltage: 3V
• Decreasing Voltage Characteristic: Within 3dB at 1V
• Frequency Range: 20Hz—16000Hz

4、Horn Parameters
Speaker diameter:

• 52±0.3mm / 52±0.3mm
• Voice coil diameter: 20mm
• Impedance: 4Ω±15%  At 1 V, 1200Hz
• S.P.L: 82± 3 dBDev    -10db
• Ref.:S.P.L.=dB
• Sine Wave At 1 w, 1 m At600,800,1000,1200Hz
• (Average).
• Frequency Response:
• Fo-18KHz
• Ref. level: At output of S.P.L.
• Resonance Frequency(f0): 110±20% At 1V,

5、Battery:

• Li-battery Capability: 7.4V/2000mAH 18650X2
• Talking time: 18（60% Vol） hours
• Playing time: 8（60%vol） hours .  4（100%vol） hours
• Standby time: About 18 months
• Charging time: 6-8 hours current1200ma max
• Charger Mode: Micro USB 5V/1.2A
• Low power alarm: 6.6V(alarm every two minutes）

6、Product parameters：

• Rms: 7.8W*2  4Ω  THD+N 10%  (1KHz/0dB)
• Frequency Response: 120HZ-18KHZ
• Distortion: 0.1% 1w 1khz
• S/N: 80dB
• Sensitive: 1khz 775mv
• Size: W204±1mm*H87±1mm*D51±1mm
• Net Weight: 742G