comfortable technics design, bluetooth system Technical Specification RMS25mWDriversφ20 x 2Impedance32Ω±15%Sensitivity116±3dBFrequency20Hz – 20KHzDimension (WxHxD)146W x 147H x 30D (mm)PlugUSB Jack for chargingCable Length---Function SpecBluetooth(A2DP,AVRCP,HFP,HSP), VOL+/-, Play/Pause, Call control,Li-ion BatteryN.W./G.W./Gift BoxL x W x HCartonL ×W ×H Sets/CartonContainerSets/20’ Sets/40’ Sets ...