7in Shake Flashlight never change batteries! Self generating system recharges the batteries! Simply shake the flashlight to produce a super bright LED light. Can sit for years and with a few shakes can operate as bright as when it was new. Bulb can withstand light bumps and drops. Clear shatter proof high tech housing. Shake the flashlight for 15-30 seconds for up to 30 minutes of light. Built in regenerating system recharges batteries by shaking the flashlight. Multiples of 12 receive a counter display.