This compact light from Nitecore is both beautiful and capable. Powered by a single AAA battery, the T5S can produce 75 lumens and attaches easily to any keychain or lanyard. The polished stainless steel finish matches the smooth and refined lines machined into the head and body. The T5S also includes a stainless steel pocket clip for a more versatile carry. Features and Specifications: High-grade 304 stainless steel construction High efficiency digital driver circuit Maximum runtime of 28 hours in low mode Three levels of brightness plus warning signal Constant current (not PWM) Convenient one-handed operation Reverse polarity protection Removable stainless steel clip included LED: CREE XP-G (R5) Maximum output: 65 lumens Runs on: One AAA battery (Batteries not included) Aluminum reflector ensures a balanced beam profile Toughened ultra-clear mineral glass with anti-reflective coating Constructed from high-grade 304 stainless steel Function selection via rotating head Waterproof in accordance with IPX-8 standard (two meters) This product has attained European CE and RoHS certification UPC: 9652506400607 Dimensions: Length: 2.87" (73mm) Diameter: .5" (12.5mm) Weight (Without battery): 0.67oz (19g)