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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 650MAH lithium battery.
Charging port: USB charging interface.
Normal charging time: 2-3 hours.
Talk time: up to 24 hours.
Standby time: up to 15 days.
Working temperature: -20 ° C -55 ° C.
Other features: support status indicator, charging indicator display.
Color: red, black,white,Blue