Portable shortware lamp used to check phosphorescence on rocks and for checking tagging on stamps of USA, Canada, Israel, Great Britain, etc. Nylon strap is attached for easy carrying. Operates on 4 "AA" batteries (included). Supplied with 4 watt ultraviolet lamp. The wavelength is 254 nm (nanometers). No filter is included with this lamp.
Size: 6-1/2" x 2-1/2" x 7/8" high