... Dual-Use Ultra High Sensitivity Pin pointer, miniature version primary detector. Sound and lights alarm,10cm waterproof detect poleTX-2002 ... used in detecting the steel rods and other metal materials in concrete wall. The detector is versatile and easy to use. Without ... locate elusive metal such as small coins, relics, jewelry, gold and silver, etc.) in sands, dug holes, divots, tec. The detector is ...