1. Bluetooth version: 5.0
2. Frequency range: 2.402GHz-2.480GHz
3. Transmission distance: about 20-30m
4. Lithium battery capacity: 3.7V/500mAh
5. Charging voltage: 5V
6. Charging time: about 2 hours
7. Standby time: about 360 hours

Features:
1. Suitable for a variety of helmets
2. With FM radio function, real-time control of road conditions
3. Using Bluetooth 5.0 technology, wider coverage, faster speed and lower power consumption
4. With voice prompt
5. Can answer calls automatically
6. Intelligent noise reduction, stable signal, clear call

packing list:
-Wireless headset x1
-Speaker kit x1
-Micro USB charging cable x1
-Paste pieces x3
-User manual x1