HAVIT HV-H914BT Lightweight NFC Stereo Sports Bluetooth Earbuds With Microphone (Yellow) Chip: CSR 8645 V4.1 Breakthrough exclusive technology doubles Soundbeats playtime to about solid 8 hours NFC function, can connect to two phones simultaneity; Skip-free music outdoors. Pure Sound In-ear white noise and listener fatigue reduction. Eliminates the white noise and delivers a clean audio experience offering hours of pure enjoyment. Sweat-proof, durable design, Battery indication for IOS system, Up to 8 hours of Talk/Playing Time and 180 hours Standby Time. High-fidelity stereo music and clear speech, begin enjoying CD quality stereo sound instantly.