Andoer YKL-701 Bone Conduction Headset Wireless Bluetooth 4.0 Earphone Waterproof Neck-strap Outdoor Sports Music Headphone Hands-free w/ Mic Black for iOS Android Smart Phones Tablet PC Notebook Release the ears to listen the world, liberated the ear, far away from dangerous, response to the surrounding situation quickly, suitable for walking, running, climbing, skating, riding, sport, etc. No eardrum damage, healthy and eco-friendly. It is suitable for child, young people who uses the headphone frequently to avoid ear damage. The sound transmits through the bone to auditory nerve, perfectly suitable for people who has trouble in listening. Noise Reduction echo and cancellation technology ensure clear sound quality. Sweat-resistant design with Nanotechnology immerse you in sports and music, no need to worry about sweat and water.