[OPEN EAR DESIGN]- Bone conducting headphones adopt Open-ear technology, which transfers sound through cheekbone to keep you more attention on surroundings [SWEAT ]- Use anti-sweat dispensing technology. Bone conduction Bluetooth headset makes long time outside sports possible-cycling, hiking, running and workout, do not worry about sweat any more [CLEAR CALLING]- Wireless open ear earbuds was built-in HD calling MEMS Microphones which provide loud and clear talking effect. [MORE CARE, MORE SAFE]- Putting on Bluetooth bone conducting earphone not let you ignore to care about the environment surrounding cute children, , your pets or other family members when working, listening music, doing yoga. Colour:black Material:plastic Package Contents: 2 x Bone Conduction Headset Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.