The multi-function, waterproof, and glow in the dark UST SplashFlash LED Light flashlight provides a broad illumination and works as a mini-lantern, safety light, and personal locater light. It runs for up to 11 hours on steady mode and up to 16 hours of flashing SOS signal -- operating on a single AAA battery (included). The SplashFlash LED Light has an IPX7 waterproof rating, protecting it against water immersion for 30 minutes at a 1-meter depth).