B39 Wireless Bluetooth Headphones

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

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