V7 Bluetooth 5.0 Business Style Wireless Stereo Sports Bluetooth Earphone, Support Inform Caller Name 1. Bluetooth version: 5.0 2. Ergonomic design, comfortable to wear 3. Life-level waterproof function, without fear of invasion of sweat and rain 4. Voice broadcast mobile phone address book, know who is calling without looking at the phone 5. Intelligently isolate the external sound and noise, greatly improving the call sound quality of the headset 6. The left and right ears can be worn freely and can be adjusted by 180 degrees 7. Remaining power of the headset, intuitively check the power of the headset on the mobile phone, support IOS and some Android systems 8. Three-dimensional operation buttons, easy to use 9. Standby time: 250 hours 10. Call duration: 25 hours 11. Listening time: 20 hours 12. Charging time: 1-2 hours 13. Battery capacity: 170mAh 14. Packing list: host x1, USB cable x1, manual x1, packaging x1, auxiliary headphones x1, earhook x1