1,Radiation proof earphone 2,Bluetooth 3.0 3,Size:79mm*59mm*240mm 4,Weight:610G Details:technical parameters:*working voltage :DC 4V*battery capacity:200mAH*holding time :12hours*Standby time:36hours*Charger:DC 5V,300mA*frequency:2404-2479MHZ*Communication distance :15M,(Normal 10M)*Charging time:1-2hours Pictures: Radiation proof earphone for iphone/skype/msn/qq/yy/google talk/voip/phone