Relefree&reg; 3AA Aluminium Invisible Blacklight Detection Ink Marker 51LED 51 LED UV Ultra Violet Mini Portable Flashlight Torch Light Lamp Brand new and high quality 51 LED UV blacklight flashlight.Long service life up to 10,000 hours.Aluminium body, light weight. Great for checking notes, credit cards, fluorescent inks (invisible inks), cracked glassware, or even crime scene. LED Qty : 51 ultra bright LEDs.Rain Waterproof. Power: 3x AA battery (not included).