USAMS YH21 Bluetooth-compatible Over-Ear Headphones HiFi Stereo Headset 70H Long Playtime Hands-Free Calls - Black

Specifications:
Material: ABS+PC
BT Version: 5.3
Connection Range: ≤10m
Speaker diameter: 40mm
Speaker sensitivity: 108 ±3db/1Khz 0.179V
SNR: ≥80db
Weight: about 223g
Battery capacity: 500mAh
Playing time: about 70 hours
Calling time: about 60 hours
Charging time: about 3 hours
Charging power: 5V/0.5A
Size: 167 * 186 * 80mm