Koolertron Professional Aviation Aluminum Alloy 4 Modes 4000 Lumens 4 X CREE XML T6 LED Bicycle Headlight With Battery And Charger "Koolertron" Is A Trademark With Guaranteed Quality Which Belongs To Kastonecorp.PLEASE CHOOSE THE RIGHT SELLER Run time on High is 1-2 Hours, Over 4-6 Hours on low Charing Time: 3.5 to 4 Hours High temperature resistance Housing Material: Aviation aluminum alloy