Signature Light, part of the Crime Scene Investigation Kit, boasts hands-free use. Wearer places light on forehead (like a headlamp) and attaches goggles to protect his or her eyes from UV. light emitted. Comes in various LED wavelengths (indicated by color of light) to reveal specific evidence. Allows user to search for bodily fluids (such as semen, urine, or saliva) that may be hidden in bedding, carpeting, or clothing. Also enables collection of latent fingerprints from crime scenes. Hands-free operation prevents contamination of evidence gathered. Runs on 4 AA batteries. Product line also includes UV. lights for identifying narcotics such as heroin or cocaine.