Bluetooth earphones SWISSTEN BONE CONDUCTION are designed for maximum safety and comfort of user. Unique technology of voice transfer through the cheek-bone ensures comfortable listening without eliminitaion of the ambient noise. Earphones have microphone for phone calls and multifunction buttons. Packed in SWISSTEN retail pack. Maximum safetyEarphones SWISSTEN BONE CONDUCTION have inovative technology of  sound transfer through the bone at sound pipe directly to the inner ear. This technology ensures comfortable listening on the one hand and possilibty of ambient sound perception on the other hand. This is very safe during the move in the traffic. No more earphones falling out of your earsDesign of earphones ensures possibility of totally free and carefree movement. You don't have to care anymore about falling earphones out of your ears. Specifications:Bluetooth: V5.0Weight: 16gBluetooth profiles: A2DP, AVRCPRange: 10mTime of listening: 6hStandby time: 120hBattery capacity: 140 mAhCharging time: 2h