Water-resistant,can use it in rainy day,but can not put it into water,Great for checking notes,credit cards,fluorescent inks (invisible inks),cracked glassware,or even crime scene etc. Made of high quality aluminum alloy material,Adjustable focus range for different usage,stretching to adjust its focus Super Bright and Working Range is Wide,blinding effect.With lanyard,convenientto use.Energy saving and environment protection. LED flashlight is small enough to fit in your pocket,handbag,or car compartment,so you can take it with you anywhere.Perfect essential gear for camping,hunting,fishing,cycling,outdoor activities and home emergency. Portable,easy to carry and store,simple to use.With strap on the tail cap,can be put in your pocket or hung on your bag.