Designed to view inaccessible areas without costly disassembly One hand operation of focus and light source 6000 pixels, 4o field of vision, Minimum focus distance 19mm Operating temperature '-23 to 49°C Probe diameter 10mm, length 914mm, maximum bend radius 203mm Halogen lamp housed in ABS case Powered by 2 x AA Batteries (NOT supplied) Spare lamps available separately