USAMS YH21 YH Series Wireless Bluetooth 5.3 Headset(Black)

Product features: 1. Breathable protein leather earcaps for more comfortable wearing 2. Immersive stereo effect, high-definition microphone call 3. Upgrade Bluetooth 5.3 solution, stable and not disconnected 4. 70 hours of ultra long music enjoyment Product specifications: Chip scheme: 5.3V Transmission distance: <=10m Speaker diameter: 40mm Speaker sensitivity: 108dB ± 3dB/1KHz 0.179V Impedance: 32 ohms Frequency range: 20-20KHz Battery capacity: 500mAh Charging voltage: 5V 0.5A Charging time: about 3 hours Calling time: about 60 hours Size: 167x186x80mm Weight: 223g