H616BT Audio series Bluetooth headphone

Vintage style Headphones High Quality Wireless Over Ear Headphone ① lightweight design ② Transparent mode Wireless Version: V5.4 | Headphones Battery: 400mAh | Play Time: 80h (60% vol.) Charging Time: 1.5h | USB Port: Type-C | Speaker Size: Φ40mm*2 Wireless Working Range: 10M (without obstacles) | Profiles Supported:A2DP/AVCTP/AVDTP/AVRCP/HFP/SPP/SMP/ATT/GAP/GATT/RFCOMM/SDP/L2CAP Audio code: AAC/SBC | Speaker Size: Φ40mm | Speaker Frequency: 20Hz~20KHz Sensitivity: 108±3dB9.17 | Impedance: 32Ω | Input Voltage / Current: DC 5V/0.5A