The TLR-7 X USB features multi-fuel capability powered by either one CR123A (sold separately) or one Streamlight SL-B9 lithium-ion rechargeable battery pack (ncluded), both delivering 500 lumens and 5,000 candela. The integrated rail clamp is designed to rapidly attach/detach from the side of the weapon, providing smooth installation and removal without having to put your hands in front of the muzzle. Customizable rear paddle switches, momentary and constant on operation, and a programmable strobe mode offer additional versatility for tactical applications. Product Specifications LIGHT SOURCE: White LED, impervious to shock with a 50,000-hour lifetime OUPUT: 500 lumens, 5,000 candela peak beam intensity, and 140 meter beam distance; Custom TIR optic for concentrated beam with optimum peripheral illumination BATTERY: One Streamlight Li-Ion 850mAh USB-C rechargeable battery pack with integrated safety circuit, rechargeable up to 500 cycles; Charges within 2.5 hours via USB-C cord BODY & FACE CAP: 6000 Series machined aircraft aluminum with black anodized finish SWITCH HOUSING: Impact- and chemical-resistant engineered polymer LENS: High temperature, shock-mounted, impact-resistant BOROFLOAT glass ON/OFF: Rear switches left and right of trigger guard provide ambidextrous operation (available with high and low actuators); Momentary and constant on operation; User-activated strobe WATER RESISTANCE: IPX7-rated design; waterproof to 1 meter for 30 minutes OPERATING TEMPERATURE: -40 F to +120 F (CR123A) or -4 F to +120 F (SL-B9) DIMENSIONS: Length: 2.58 in. (6.55 cm); Width: 1.18 in. (2.98 cm); Height: 1.27 in. (3.23 cm) WEIGHT: 2.64 oz (74.8 g) with battery INCLUDES: Interchangeable Rear Paddle Switches, SL-B9 USB-C Rechargeable Battery Pack, Multi-tool, and Key Kit