The RT-3 features the quintessential NEXTORCH anti-rolling structure. "RT" stands for "Rechargeable Tactical," and this rechargeable light is designed to be tactical from the very beginning. It's made of aero-space grade aluminum with a hard-anodized finish body and produces 60 lumens high output.3.6V Xenon incandescent Bulb60 lumensRuntime: 70 minutesOne NT18650 rechargeable lithium BatteryDistance: 407'/ 124mAerospace grade aluminum 6061-T6Hard black titanic anodizing finishFull clear glass lensDimensions: 4.88" x 1.09" / 124 x 29mm (head diameter 1.34" / 34mm) Click on/of switch