ON THE WAY900 Lumen Expedition Handheld Flashlight Led Xml-T6 5 Modes Water Torch Adjustable Zoomable Tactical Light Lamp with 18650 3.7V Rechargeable Lithium Battery and Charger (Golden) Reverse polarity protection: protect the LED light do not burn out if the battery installed wrong Adjustable focus range for different usage, stretching to adjust its focus Use one 18650 rechargeable Li-ion battery or 3 AAA batteries 5 switch modes: high / medium / low / strobe / SOS Skid-proof andwater resistant design, best suitable for Outdoor Camping, Climbing, Cycling, etc