LETION UV Flashlight Black Light 2 in 1 2 Pcs,UV Light LED Black Light flashlights with 500LM Highlight&4 Mode&Waterproof IPX 4 for Pet Clothing Food Fungus Detection/Night Fishing/Travel/Camping.These flashlights come in very handu.You can detect pet stains.It can detect fungi in food and check if bills and banknotes have been counterfeited, which can help with antique appraisals.You can  switch between the four lighting modes using the power switch. High white light/Low white light /SOS /High UV light.It does need 3 AAA batteries.These flashlights are very lightweight so you can easily take it along anywhere.I like to leave one of these inn my car glovebox , that ways they are always handy.You get 2 flashlights in this pack.