Product details of B39 Wireless BT Headphones Portable Headset Big Earphone Support TF Card Play FM Mp3 Player With Mic LED Colorful Breath Light
- B39 Wireless BT Headphones Portable Headset Big Earphone Support TF Card Play FM Mp3 Player With Mic LED Colorful Breath LightName: B39.Uses wireless headphones, and 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 Charging port: mini 5-pin 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
