Bluetooth headphones with microphone A4tech BH220, Bluetooth v.5.3, Beige

Bluetooth headphones with microphone A4tech BH220, Bluetooth v.5.3, Beige

A4Tech/Fstyler Bluetooth v5.3 Wireless Headphones
Hybrid speaker diaphragm: Φ40mm
Low latency data transmission: 45ms
Design: Dual-Chamber
Metal adjustable padded headband
Ergonomic soft earcups
Ambient noise canceling microphone
Remote control
Collapsible in 3 directions, convenient for travel
Extended playback time, up to 40 hours + fast charging

Range: up to 15m (49 feet)
Built-in battery: 400mAh Lithium
Charging time: approximately 1.5 hours.
Frequency range: 20 Hz - 20 kHz
Sensitivity: 100 dB
Impedance: 32 ohm
Microphone:
Frequency range: 100 Hz - 10 kHz
Sensitivity: -42 dB
Type: ENC Omni-Directional
USB Type-C charging cable: 50 cm