Bluetooth Headphones,Fetta V4.1 Wireless Sport Headphones Stereo In-Ear Noise Cancelling Sweatproof Headphones with Mic for iPhone 6S Samsung Note LG HTC Sony iPad And Other Android Devices (Black) 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.Within 10-meter working distance,no delay and no noise Sport bluetooth headphones built-in high-quality polymer battery (85mAh),2 hours charging time,up to 5 hours music time and 175 hours standby with a single charge Behind neck bluetooth headphones with comfortable and secure ear-fitting design for all exercise,offer you a stable connection.It make easy accessible on-ear controls and get rid of troublesome wires tangling while you control your music or calls Compatible with iPhone 6s 6Plus Samsung Edge Note Galaxy HTC LG Lenovo Sony ipad mini and Other Bluetooth Enabled smart devices