TLR-7 Sub Compact Rail Mounted Tactical Light for Sig Sauer P365 And Sig Sauer P365 XL subcompact handguns Uses one CR123A lithium battery (included) 500 lumens; 140m beam; runs 1.5 hours; Durable, anodized machined aluminum construction; Ultra-lightweight and compact; High power LED for extreme brightness Ambidextrous operation; Safe off feature prevents accidental activation. Saves batteries Rail clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle