Balance World Inc UV Ultra Violet 21 LED Flashlight Mini Blacklight Aluminum Torch Light Lamp BUY 1 21 LED UV black light flashlight Long service life up to 10,000 hours Aluminum body, light weight Great for checking notes, credit cards, fluorescent inks (invisible inks), cracked glassware, or even crime scene LED Qty : 21 ultra bright LEDs Rain Waterproof Power: 3x AAA battery (not included) Package Included: 1 x UV 21 LED Flashlight