1) It is based on advanced magnetic induction technologies, so it has a long service life and reliable performance
2) Shaking it for 30 seconds, and it keeps working for more than 120 minutes.
3) No battery inside the flashlight
4) There is a big capacitor inside the flashlight. Its use is to keep power from shaking and supply power to flashlight.
5) Waterproof
6) Warranty: 1 year