Features: Crystal-Clear Connection It is equipped with BT 5.0 and HD voice technology for a stable connection and superior call quality. Secure Fit Ergonomically designed, this headset sits on your ear securely with a personalized eargel and earhook. Long Standby Up to 7 hours of talk time / 5 days of standby time let you make calls throughout the day on a single charge. Easy to Use Remote controls let you adjust the volume, skip a track or taking a call - all with the finger click. Did you notice that? This headset is designed for both left and right ears. You can adjust the angle by rotating the eargel. Specification： Color: black BT Version: V5.0 Talk Range: 10m Cell Capacity: 100mAh Standby Time: 125 hours Talk Time: 7 hours Music Play Time: 7 hours