Nightstick Polymer Multi-Function Tactical LED FlashlightNon Rechargeable2 CR 123 Batteries800 Lumens Black. The tail-cap switch provides momentary or constant-on functionality a set of user-selectable high medium or low-brightness settings as well as a disorienting strobe. The housing is made from glass-filled nylon polymer. Power comes from a rechargeable Lithium-ion battery and includes the ability to run from a pair of CR-123 batteries (batteries not included) thanks to the CR-123 Battery Carrier (included). Specifications for Nightstick Polymer Multi-Function Tactical LED Flashlight: Manufacturer: Nightstick Flashlight Application: Tactical Duty Color: Black Fabric/Material: Glass-Filled Nylon Polymer Beam Color: White Light Output: 800 lumens Bulb Type: LED Beam Distance: 205/157/99 m Bezel Diameter: 1 in Length: 6.25 in Weight: 5.1 oz Water Resistance Level: IPX-7 Additional Features: Momentary or constant-on plus 3 brightness levels and strobe Large textured tail-switch Super-bright Xtreme Lumens design Sharp focused flashlight beam Non-Slip Grip High-efficiency deep parabolic reflector Quantity: 1 Battery Type: CR123A Package Contents: Nightstick Polymer Multi-Function Tactical LED Flashlight Rechargeable battery CR-123 Battery Carrier Nightstick TAC-540XL: Xtreme Lumens Polymer Multi-Function Tactical LED FlashlightNon Rechargeable2 CR 123 Batteries800 LumensBlack