This is the external Warning Light Unit for the DOM-410 Geiger Counter. It is a rectangular box 11 * 10 * 4 Cm with a power and a signal cable. The power cable connects to 6-28 Volt DC external power source, which could be provided from a vehicle battery. The other cable connects to the = connection of the DOM-410 Geiger Counter. There is a red light on one side of the warning box that flashes red to indicate radiation when the reading on the Geiger Counter scale lies between 0.3 and 0.7 of the scale, depending on the selected range. The unit is supplied in very good working condition, Grade 2.
