Genuinely Enhanced 400 Lumen Output Casts Just the Right Amount of Identifiable Light Without Temporarily Blinding the Operator. Integrated Reflector and Bulb Preset Flood Focus Design Ideal for Instantaneous Target Identification. User Friendly Ambidextrous Toggle Switch Operation for Both Left or Right Handed Manipulation with Momentary/Permanent On/Off. Integral Low Profile Snag Free Picatinny Mounting Deck. Removable Centered and Offset Posi-lock tabs for Increased Compatibility Across a Larger Variety of Pistols. Matte Black Hard Coat Anodize Aluminum for Durable Wear Resistance. Includes 1x CR2 Battery