In developing the MAG-TAC LED flashlight, MagLite aimed to produce an advanced lighting tool that, in appearance, build quality and performance, would rival tactical flashlights costing several times more. The result is the first Mag flashlight to use extreme-performance lithium CR123 batteries a rugged, fast-handling, fist-grabbable flashlight that achieves truly stunning performance for its size. Thanks to a tailcap switch, it turns on and off without changing the beams focal setting.Designed with extensive input from police tactical users and yet suitable also for civilian use, this plain-bezel version of the MAG-TAC LED flashlight comes with a detachable pocket clip and features three modes: Two power levels (Full Power for extreme brightness and Power Save for prolonged battery life) plus a Momentary mode (in which the light stays on only while the switch button is being pressed) all selectable through Mag Instruments talicap-switch-activated Quick-Click mode selector.Specifications:- Length: 5.195 - Barrel Diameter: 1.050 - Head Diameter: 1.050 - Weight with Batteries: 4.8 oz.- Batteries Required: 2 CR123 batteries (included)