Bluetooth P9 Headphones

Bluetooth version:5.3 Transmission distance: 10m Battery capacity: 400mAh Frequency response:20Hz~20kHz Sensitivity: 105±3db Speaker diameter: 40mm Call playback time: about 7-10 hours Standby time: about 120h Charging time: about 2h Built-in microphone: YES Usage mode:Bluetooth/TF card mp3 mode(Maximum Support 32g) Charging voltage:5V-1A Song switching: Support Volume adjustment: Support Answer the call/hang up the call: Support Audio I/O interface: Support Bluetooth version:5.3