Bluetooth 5.3 foldable & stretchable long standby time full compatibility comfortable to wear surround stereo 40mm moving coils powerful & vigorous horns ultra low latency cool ambient lights 500mah battery capacity about 1.2 hours charging time about 13 hours play time wired and wireless switchable support micro sd card type-c charging interface buttons: on/off, switch lights, volume+/-, next/previous, multi-function button frequency response: 20hz - 20000hz sensitivity: 90db impedance: 32ω microphone: -38db (2.2ω) what's in the box 1 x awei a780bl pro 1 x charging cable 1 x aux cable user manual we offer delivery services if required.