Creazy&reg; Uv Ultra Violet 21 LED Flashlight Mini Blacklight Aluminum Torch Light Lamp 21 LED UV 395-400 nm flashlight Long service life,Light weight Great for checking notes, credit cards, fluorescent inks (invisible inks), cracked glassware, or eve Suitable for outdoor activities as well Note:Due to the intensity of this UV LED device, UV protective glasses are recommended.