Material :6061-T6 aluminum alloy Surface :horniness anode oxidation Battery: 1 x 18650 rechargeable battery Bulb type: CREE P4 LED Max Output: 120 lumens Size: 145(L) x26(B) x 33(H) mm Weight: 120g Battery Life: when (3watt) mode continous use 240 minutes; When (1watt) mode continous use 360 minutes; When strong flash continuous use 240 minutes. Operation: 3 modes when open strong shine (3 watt mode) after 3 second inferior shine (1 watt mode), then strong flash mode (signal for salvation). Remark: perdue rechargeable hole can be found when twist the body of torch. 0.5 mater water proof.