Virtually indestructible LED regulated to maximize output and runtime Faceted reflector creates flawless MaxVision Beam thats broad and evenly dispersed Ergonomic, intuitive pushbutton switch delivers max output on first press; or can cycle through lower levels with a sustained press Lightweight, durable polymer body; adjustable nylon wristband Securely straps to support-hand wrist for instant access and automatic alignment with handgun when using a standard two-handed grip Includes one disposable, high-energy 123A lithium battery with 10-year shelf life