Brand: RUSTU Model: R20Z Material: Aluminum Emitter Brand: Cree LED Type: XM-L BIN: T6 Color: Cool white Number of Emitters: 1 Voltage Input: 8.4V Battery Configuration: 1 x 18650 (not included) Circuitry: 1050mA Brightness: 800lm (manufacturer rated actual 400lm) Runtime: 3 hours Number of Modes: 1 Mode Arrangement: Dimming Mode Memory: No Switch Type: Slide Switch Location: Head Lens: Tempered optical glass lens Reflector: Aluminium Textured / OP Strap Included: Yes Clip Included: No Beam Range: 200 meters Other Features: HA-III surface; IPX8 waterproof; Head diameter: 18mm; Body diameter: 10mm; Tail diameter: 13mm; Overall length: 80mm; Strap length: 40cm. Certification: CE