Brand: FEREI Model: 521 Material: Aluminum Emitter Brand: Cree LED Type: XM-L BIN: T6 Color: Cool white Number of Emitters: 1 Voltage Input: 3.6~4.2V Battery Configuration: 1 x 18650 (included) Circuitry: 2.4A Brightness: 860lm Runtime: 1~10 hours Number of Modes: 3 Mode Arrangement: Hi > Mid (10% / 20% / 30% / 40% / 50% / 60% / 70% / 80% long press after high mode) > Strobe (Alarm strobe / Slow strobe / Fast strobe / SOS long press when it off) Mode Memory: Yes Switch Type: Forward clicky Switch Location: Middle Lens: Glass Reflector: Aluminum Textured / OP Strap Included: Yes Clip Included: No Beam Range: 350 meters Other Features: Waterproof: IPX4; Hard anodized Other Accessory: 1 x Flashlight 1 x USB cable (40cm) 1 x Chinese / English user manual 1 x 18650 battery