ANNT 2packs Adjustable Focus Mini CREE LED Aluminum Flashlight Torch with charger & Lanyard, Batteries Not Included, Super Bright, Zoomable LED Flashlights Tools 600 Lumens (Max Output) Cree Q5 LED; Sturdy and well built; Easily and durable use; Small, compact and Versatile; Use in a wide variety of situations and circumstances The construction is top to bottom aluminum alloy material. Also there is an O-rings on the connections that ensure that the product is water resistant, but it is NOT water proof. The switch in the end is rubber encapsulated so that also prevents water get in. It also has a small wrist strap; Suitable for Self Safety, hunting, cycling, climbing, camping and outdoor activity etc. There are 2 function about the bottom switch. Fully press it you can turn on/off the flashlight. Half press the switch you can change the lighting model. (High-Low-Strobe); Zoom In/Out to adjust its Focus: x1, x250, x500, x1000, x2000; Adjustable focus zoom lens allows you to easily switch from a narrow beam to widespread coverage It is interchangeable with three AAA batteries or a 18650 lithium ion 3.7 V battery(not included); Come with a plastic round piece to secure the 18650 lithium battery so it doesn't move around inside the flashlight Come with universal battery charger included, but you need to order the rechargeable battery separately; When the jack is plugged in, the red color indicates charging in progress. Green light indicates fully-charged battery.