EasyIDea Handheld UV Blacklight is perfect for analyzing and verifying ID's and other items that use UV ink. This light makes it easy to illuminate hologram overlays. The 6 inch blacklight tube is very high powered so there is no question of being able to see what you need to. The light also has a powerful white light flashlight so it offers companies a multipurpose solution. This is perfect for security guards and others that need both types of light to do their job. This handy light runs on 4 AA batteries which are sold separately. The standard battery size makes it easy to use rechargeable batteries for added cost savings.