This is the Ultra-Brite Adjustable Rate Strobe Light from RAM. FEATURES: Adjustable rate High Intensity bulb Pre-assembled INCLUDES: One connector for 9V battery One ON/OFF switch One high-intensity bulb One small circuit board with rate adjustment screw One clear dome lens REQUIRES: 9V battery SPECS: Weight: 1oz. Wire Length: 35" of wire between circuit and strobe Circuit board- Length: 2" Width: 3/4" Height: 7/16" COMMENTS: A 9V alkaline battery will provide many hours of operation and result in the lowest possible system weight. MAF7/27/00 ir/jl