Brand: RUSTU Model: R41F Material: T6063 T6 Aluminum Emitter Brand: Cree LED Type: XM-L BIN: T6 Color: Cool white Number of Emitters: 1 Voltage Input: 4.2V Battery Configuration: 1 x 26650 / 1 x 18650 (not included) Circuitry: 1000mA Brightness: 900lm (manufacturer rated actual 388lm) Runtime: 4 hours (Hi mode) Number of Modes: 5 Mode Arrangement: Hi > Mid > Lo > Fast strobe > SOS Mode Memory: No Switch Type: Reverse clicky Switch Location: Tailcap Lens: Tempered optical glass lens Reflector: Aluminum smooth / SMO Strap Included: Yes Clip Included: No Beam Range: 200 meters Other Features: HA-III surface; IPX8 waterproof; Comes with a 18650 battery holder. Certification: CE