Generic Bone Conduction Bluetooth Headphones, Wireless Sport Stereo Microphone Ear Open Headband Headset for Running Cycling Walking Driving -Black Color NO NEED TO PUT INTO EAR: Liberated the ears, far away from danger, response to the surrounding situation quickly. Suitable for walking, running, hiking, skating, skiing, sports etc. Also suit for Driving, riding, to avoid the possibility of accidents NOISE CANCELLING HEADPHONES: Double microphone noice reduction system, even in a noisy environment can talk clearly 2 IN 1 FUNCTION BLUETOOTH: With Two Class Bluetooth,you can connect this Bone Conduction Headphone with Two Bluetooth devices at the same time, support all digital products which with bluetooth device LONGE TIME PLAYING: Rechargeable built in battery for long play time and eliminate the need for constant battery changes OUTSTANDING DESIGN: Light weight and U-shaped design according with human body engineering, wearing also is very comfortable for a long time