Product Description

Model: B39.
Uses: wireless headphones, voice headsets.
Bluetooth version: V5.0.
Bluetooth mode support: A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5.
Frequency: 2.402-2.480GHZ, 2.4G ISM band.
RF performance: receiver sensitivity: -84dBm; transmit power up to 4dBm.
Frequency response: 20 Hz-20 KHz.
Signal to noise ratio (SNR): 70Db.
Total harmonic distortion rate (THD) 0.1%.
Power indicator: Red and blue indicators flash alternately.
Headphone charging: rechargeable 400MAH lithium battery.
Charging port: USB charging interface.
Normal charging time: 2.5 hours.
Talk time: up to 10 hours.
Standby time: up to 20 days.
Working temperature: -20 ° C -55 ° C.
Other features: support status indicator, charging indicator display.
Color: black red,red black,white,black.blue

1 x Bluetooth headset.
1 x charging cable.
1 x 3.5mm audio cable.
1 x Chinese and English user manual.