The Fenix TK20R USB rechargeable flashlight delivers a maximum beam distance of over 1000 feet (310m) by utilizing the CREE XPL HI V3 LED with a maximum output of 1000 lumens. Powered by a USB rechargeable 18650 battery, this flashlight can also use two cold-resistant CR123As as standby batteries. The TK20R features include a dual layer body, inner waterproofing treatment, a tactical tail switch along with a side switch, and battery power indicator. This compact, USB rechargeable flashlight is designed for tactical and industrial applications.