The MD-5-II handheld metal detector has obtained a national patent. It has alarm and audio/light auto-switch functions. With very low power consumption and pocket size, it can be used for public security in railway stations, docks, prisons, customs and also a excellent inspector for needles or pins hidden in the clothes or cotton materials. This machine has passed product quality inspection handled by the Public Security Department of China. Size: 20 x 6 x 3.5cm