Wireless Headphones EV620BT

Bluetooth Version: V5.0
Frequency: 2.40 GHz-2.48 GHz
Power: ≤ 4 dBm, Class 2
Effective range: 10M
Sensitivity: 105db / 0.1% Ber
Frequency response: 20Hz-20kHz
S / n rate: 110 dB
Distortion :0.10%
Speaker size: 40mm
Support A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5 Voltage: 3.7vdc (350mAh rechargeable battery) Talking time: 8 hour
Music time:6 hour
Standby time: 148 hours
Charging time: 1.2 hours
Current: 20 mA
Operate temperature: -4 ~ + 131 ° F (-20 ~ + 55 ° C)