Fangrui Product Details 1. Yz06 Wireless Bluetooth Helmet Headphones 2. Bluetooth Version: 5.0 3. Frequency Range: 2.402ghz-2.480ghz 4. Transmission Distance: About 20-30m 5. Lithium Battery Capacity: 3.7v450mah 6. Charging Voltage: 5v 7. Charging Time: About 2 Hours 8. Standby Time: About 360 Hours 9. Features: 10. Suitable For A Variety Of Helmets 11. With Fm Radio Function, Automatic Search For Radio Stations, Real-time Control Of Road Conditions 12. Using Bluetooth 5.0 Technology, Wider Coverage, Faster Speed And Lower Power Consumption 13. Waterproof And Dustproof, Easy To Use 14. Automatically Answer The Call After The Call, No Need To Reach Out For Operation, Safe Riding 15. Recognize And Reduce Environmental Noise, And The Call Is Clear 16. Packing List: 17. -wireless Headset X1 18. -speaker Kit X1 19. -type-c Charging Cable X1 20. -earphone Clip X1 21. -tools X1 22. -screw X4 23. -user Manual X1