Our flashlights are made of a plastic case and a metal interior, and do not need to be charged according to the principle of triboelectrification. The LED can be used continuously for 1500 hours, the battery can be continuously charged 200,000 times, the gearbox can continuously work 100,000 times. No need to replace parts in use, until the use of the limit.Suitable for outdoor night camping and mountaineering.Rush service and Unprinting service is acceptable.Price above 2000pcs is via Ocean freight.