Descriptions: The UV 21 LED Flashlight Torch Light is great for checking notes, credit cards, fluorescent inks(invisible inks), cracked glassware, or even crime scene. It is also perfect for camping, outdoors, around the house and many other uses. It has aluminum housing and very solid. It is light weight that you can carry it around. Features: 1. Aluminum body, lightweight with simple waterproof function, but can not be put into the water 2. 21 LED UV blacklight flashlight 3. Great for checking notes, credit cards, fluorescent inks (invisible inks), cracked glassware, or even crime scene 4. Single key operation, easy to use 5. High quality aluminum housing Specifications: Material: Aerial Aluminum Shell Color: Glossy Black Emitted Color: Purple Wave Length: 395nm LED Number: 21 Focus: Do not focus Battery Type: 3 x AAA batteries (not included) LED Type: F5 Purple Light Switch: Tail Push Button Light Package Included: 1 x 21 LED Flashlight Note: Batteries are not included in the package Long service life and Light weight Great for checking notes, credit cards, fluorescent inks (invisible inks), cracked glassware, or even crime scene. It is perfect for camping, outdoors, around the house and many other uses. Lightweight with simple waterproof function, but can not be put into the water The body of this flashlight is built of high quality aluminum alloy, and it has a very solid construction.