Batteryguard prevents battery drain so you have power when you need it. Retains brightness up to 2x longer, 25% longer battery life. Allows batteries to be stored in lantern for years. Lifetime LEDs never need to be replaced. IPX4 water resistant design. Impact resistant up to 2 meter. Up to 200 lumens of light. Lasts up to 15 hours on high. Uses 4AA Batteries (sold separately). Beam distance up to 7M.