Streamlight TLR-4 Rail Mounted Laser Sight and Flashlight w/Rail Keys and Battery CR2 Lithium Red 170 Lumens Black. These Pistol Weapon Lights from the vanguard at Streamlight feature 125 lumens that shines bright in even the darkest conditions. This Streamlight Laser Sight Flashlight is compatible with most full-sized handguns with rails on the market. This TLR-4 is the perfect addition to your collection of optics. Its' compact size and powerful illumination is perfect for mounting. Specifications for Streamlight TLR-4 Rail Mounted Laser Sight and Flashlight: Manufacturer: Streamlight Light Output: 170 lumens Bulb Type: C4 LED Battery Type: CR2 Lithium Beam Color: Red Color: Black Length: 2.73 in Weight: 2.81 oz Gun Make: Heckler & Koch Battery Life: 1.5 hours (LED or LED & laser); 11 hours (laser only) Weather Resistance: Water Resistant Finish: Black Lens Material: Borofloat Battery Quantity: 1 Condition: New Gun Type: Pistol Mount Type: Picatinny Attachment Type: Picatinny Features of Stream Light TLR4 IPX4 Laser Sight Flash Light for Handguns: Combination tactical flashlight and laser sight by Streamlight Case made from impact-resistant engineering polymer Durable aircraft aluminum face cap Ultra-compact and lightweight Lens made from Borofloat high temperature glass Uses a C4 LED bulb with a 50000 lifetime and high shock resistance Equipped with a 640-660nm red laser for precise targeting 125 lumen max LED output Textured parabolic reflector for concentrated beam shape Regulated intensity with optimized electronics Ambidextrous momentary/continuous On-Off switch Three-position mode selector switches from flashlight to laser to combination Runs for up to 11 hours with laser only Powered by a single 3v CR2 battery One-handed installation interface keeps hands away from muzzle while installing and un-installing Windage and elevation screws mounted in brass bushing to improve zero retention of laser IPX4 water resistance Backed by Streamlight limited lifetime warranty Available for a wide range of handguns Case Material:Impact-resistant engineering polymer Facecap Material:6000 series machined aircraft aluminum Laser Wavelength:640-660nm LED Output:125 lumens Operating Temperature:20 to 120 F Package Contents: Streamlight TLR-4 Compact Handgun Laser Sight Flashlight Key Kit included for mounting to a vaiety of guns (H&K USP models do not include key kit) Borofloat high temparture glass lens Streamlight TLR-4 Rail Mounted Laser Sight and Flashlight w/Rail Keys and Battery 69240: CR2 Lithium Red 170 Lumens Black