TX850 Gold and Metal Detector The device is like new, used for three days. The device is Chinese-made but one of the best Chinese devices. The device has a digital screen and has an iron isolation feature. The device comes with three coils (dishes). 1- Large dish for treasures and greater depth and larger search area, searches up to a depth of one and a half meters. 2- Medium dish, less depth, searches for civilian coins up to half a meter. 3- Specialized dish for searching for raw gold in rocks and soil from 30cm to 50cm. Contact serious buyers only.