☆Bone conduction technology Sound wave transmission long hearing and not hurt ear:comfort, fashion and safety.
☆Glasses of the lens can be demolished. And provide free transparent lens mold for Myopia&Older.
☆Bluetooth4.1 phone:Standard effective transmission distance:10M.IP67 waterproof.
☆Battery: rechargeable lithium battery (250mAh/3.8V), Charging time:2hours, Standby time:300hours, playing music about 3-4 hours (depending on the volume and sound source varies), continuous call about 4-5 hours. Compatible with SmartPhones Iphone LG HTC Samsung Android Windows.
Vocalskull