Fangrui Product Details 1. T6plus Motorcycle Helmets Smart Intercom And Bluetooth Headset 2. High Sound Quality, Effectively Reduce Wind Noise, High Speed Can Also Be Clear To Answer The Phone Intercom 3. Support Multi-person Intercom, Intercom Distance Up To 1.5km 4. Wireless Transmission Range: About 1500m 5. Mobile Phone Call Distance: About 50m 6. Bluetooth: 5.1 7. Support Bluetooth Protocol: A2dp,avrcp,hshf 8. Battery Capacity: 850mah 9. Interface: Type-cusb-c 10. Charging Time: About 2.5h 11. Working Time: About 30h 12. Charging Voltage: 5v 13. Speaker Diameter: 40mm 14. Frequency Range: 2.402ghz-2.480ghz 15. Material: Abspvc Plastic 16. Size: 10.1 X 5.4 X 2.05cm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.