Vsport&reg; - Original Bone Conduction Wireless Stereo Bluetooth Headphone Earphone with Mic , Noise Cancellation for Mobile Phone and Bluetooth Device - Innovative Bone Condution Technology- Uses vibrations to transmit sound waves directly to the cochlea. Listen to music without blocking your ears, realize free communication! - Ear-free Design- Worn over the ear, out of the touch of aurical and inner ear, avoiding the risk of swelling and bacteria growth. Open fit, assures unmatched ambient sound awareness and extended comfort. Avoid the risk of traffic accident and damage to your ears during exercises, let you be aware of the surrounding situation at any time. - Adjustable headband for tight and comfortable wearing, no worries of the headset falling. Universally Compatible - Suitable for most Bluetooth-enabled devices, such as iPhone6s plus 5S 5 4S and Android smartphones, Samsung Galaxy phones and so on. - Stereo Sound quality, make you enjoy a listening feast. Built-in microphone and 250mAh battery. Standby Time up to 120 hours, no need to charge it frequently. - Sweat Resistant- No worries for outdoor exercise. Applied bluetooth V3.0, wireless transmission distance up to 10m. Support 2 phones connection simultaneously. Call reminder, answer the phone call. Available colors: white & black for your option.