The TCM-550XLS Compact Weapon-Mounted Light uses a super-bright LED rated at 550 lumens working in conjunction with a precision-engineered total internal reflection (TIR) lens to create a bright white beam of light rated at 136 meters. This weapon light features completely ambidextrous and intuitive rear-facing toggle switches on each side of the light to operate momentary, constant-on, and strobe lighting modes. The housing of the TCM-550XLS is constructed from aircraft-grade 6061-T6 Aluminum with a polymer rear housing. Includes four handgun-specific modular rail inserts (pre-configured with C1 insert for Glock pistols), two spare Allen screws, an Allen wrench, and one CR123 Lithium battery. Specifications: LED technology Ambidextrous rear-facing toggle switches Momentary, constant-on flashlight & strobe Aircraft-grade 6061-T6 aluminum housing Type III hard anodized finish Sharp, focused beam rated at 136 meters Waterproof Impact & chemical resistant Serialized for personal identification 1 CR123 battery (included) Limited Lifetime Warranty