1. Inside is lithium battery 1800mAh, it can be rechargeable .
2. 808nm and 650nm combine together,
3. Working mode : Pulse and continuously can be selection,
4. Treatment time can be adjusted,
5. Power intensity can be adjusted also .
6. 17pcs laser beam in one device
7. Type C and USB charge port.
8. 5200mAh lithium battery powered .
9.Easy to use.