Universal Bluetooth Neckband Stereo Headphones In-ear Sports Running Earbuds-Built in Mic with Noise Cancellation (Black) igh-quality Sound: Latest wireless bluetooth 4.1 technology with A2DP stereo tech, provides you a Hi-Fi quality stereo music, crystal clear sound, while staying at home, in the office, running, jogging, cycling, skating, etc Connect Two Devices at The Same Time and dont miss your calls when you have two cell phones Sweat-proof : the material of the headset is in a sweat design, do not dip it in the water / Exercise-proof : Very comfortable and secure in the ears Compatible with most cellphone and devices with bluetooth capabilities. High quality sound with had speaker and enhanced bass effect Quality Guarantee-Which guarantees high fidelity,stable performance and excellent communication effects