1. Never need battery. Twish the end cap of flashlight body (in any direction) 1 minute for the built-in dynamo to generate 30 minutes of light.

2.1 LED, . Brightness of lighting: 25000 mcd. LED lifetime: 50000 hours

3.1.5F capacitor.

4. Waterproof and Shock-proof. Operating temperature from -20 º C to +55º C.

5. Dimension: 150*47*47mm

6. Net weight: 155g

7. Material: Surface painting handle, rubber end.