*** Specification of wireless *** —> Wireless version : 4.2 —> Operation distance : 10m —> Range of frequency : 2.402 – 2.480GHz ISM band. *** Specification of Earphone *** —> Type : stereo earphone with MIC —> Speaker : 40mm —> Impedance : 32 —> Sensivity : 110dB / -3dB —> TF card supported : 128M – 32GB —> FM frequency response : 87.5 – 108MHz —> Rechargeable lithium battery : 150mAh. *** Feature *** —> Smart power save mode : if not connected BT mode , it turn off automatically after 5 minutes. —> Allow you to enjoy digital -quality music wirelessly and convert between music and phone calling mode freely. —> Support BT stereo devices to receive stereo music from laptop computer , tablet PC,blackberry,BT adapter or another devices that support BT stereo audio. —> Talk time up to 4 hours. —> Music time up to 4 hours.
