Compact, durable, and heat-dissipating CNC machined aluminum construction Improved optics boost output to 500 lumens Mode Memory function returns to selected mode after turning off 5 combined lumen and flash modes Enhanced MOR (Maximum Optical Reflection) lens with built-in side visibility Integrated cable free recharging USB stick Advanced Li-Poly battery for superior run time Multi-fit rubber strap attachment Black 5 Front Silicone Strap USB 500UPC/EAN/GTIN: 4712806002176