Battery: 5# battery 2 (AA*2) 
Power: 1 w
Rated voltage: DC 3V
Waterproof grade: IPX7
Working mode: 2 minutes
Net weight: 51.5 g
Dimensions: 222*25
Functional description:
1. Gear memory function: switch gears continuously within 5 seconds, one gear in turn, second gear, third gear, and shutdown. Press the button for more than 5 seconds, and then press shutdown again. Shut down after working for 5 seconds and remember the last working mode. (one, two, three gears, three lights from top to bottom)
2. When working, three lights shine continuously, indicating that the battery is about to run out, and remind to replace the battery.