Brand: Ultrafire Model: WF-501B Emitter Brand/Type: Philips Lumiled Emitter BIN: Luxeon K2 (PW14U003W) Emitter Color: White Total Emitters: 1 Battery Configurations: 1 x 18650 or 2 x 3.0V/3.6V CR123A batteries Voltage Input: 3.0V~18.0V Switch Type: Clicky (Clickie) Switch Location: Tailcap (Tail-cap) Modes: 1 Mode Memory: - Mode Arrangement: - Typical Battery Runtime: ~1 hour (manufacturer rated) Brightness: 100 lumens max (manufacturer rated) Circuitry: 800mA Current Output Digitally Regulated Driver Circuitry Lens: Coated Glass Lens Reflector: Aluminum Textured/OP Reflector Carrying Strap: Strap Included Carrying Clip: -