• BK, 3266 • Master-slave control, touch operation • Version 5.0, IPX5 • Charging base 200mAh • Earbuds each 30mAh • Non-stop playing time: 2-3 hours • Speaker: Φ6mm • Impedance: 16Ω • Sensitivity(SPK): 95±3dB@1KHz • USB: Type-C cable • Earbuds size: 15.5*16.5*14.0mm • Charing box size: 25.0*25.0*60.0mm