Fangrui Product Details 1. Motorcycle Helmet Navigation Call Cycling Bluetooth Headset 2. Bluetooth Version: V5.0 3. Frequency: 2.402ghz-2.480ghz 4. Range: 20~30 Meters (depending On The Surrounding Environment Of The Device Such As Obstacles, Etc.) 5. Microphone Transmission Distance: 1 Meter 6. Lithium-ion Battery: 3.7v180mah 7. Play Time: About 8 Hours 8. Charging Voltage: 5v 9. Full Headphone Battery: 1.5h 10. Play Time: 8h 11. Standby Time: 160h 12. Automatically Answer Incoming Calls And Support Hands-free Function, Making Riding Safer And Communicating With Friends More Convenient 13. With Advanced Bluetooth And Dsp Noise Suppression Technology, You Can Enjoy A Wireless Two-channel Stereo Music Experience While Riding. 14. Convenient And Simple Music Operation, Easy To Switch Songs And Adjust Volume While Riding 15. Supports Displaying Battery Status From Ios And Android Phones To Facilitate Timely Charging. 16. Built-in Large-capacity Lithium Battery Supports Long-term Standby And Work 17. You Don't Need To Reach For Your Phone To Answer Calls. You Can Also Listen To Music On Your Phone, Select Songs, Adjust The Volume, And Call Back With One Click, Making It Safer And More Convenient. 18. Handset Size: 230mm Long, 13mm Thick