LSoug Wireless Bluetooth Headphones, Noise Cancelling, Sweatproof Earbuds for Sports, Suitable for IOS & Android Devices bluetooth headphones with mic sealing with unique cavity structure design, increase 20% effective area in vibrating diaphragm , adopt CVC6.0 smart noise reduction technology, own clear bass resonance, built-in HD microphone provides you a high fidelity and stereo sound bluetooth wireless headphones has a higher profile,equipped with Bluetooth 4.1and CSR Chipset strengthen the signal 2 times , Compatible with most Bluetooth-enabled devices with 10-meter working distance, no delay and no noise sport bluetooth headphones built-in high-quality polymer battery (80mAh), 2 hours charging time ,up to 5 hours music time and 175 hours standby with a single charge. Stable Connection: behind neck bluetooth headphones with comfortable and secure ear-fitting design for all exercise, offer you a stable connection ,make easy accessible on-ear controls and get rid of troublesome wires tangling while you control your music or calls. bluetooth headphones working out control all functions of your music and calls via simple user interface . If you are not satisfied, we provide any refund or return service.