RAM DBSC1-R Motor Starter. This is a complete motor starter set-up for a Frick 150HP compressor. However, the Ram DBS box included will work for up to a 700HP compressor. Buyer will need to reconfigure parameters and dip switches and radial switch setting for their application. Includes relevant paperwork, interface  and cable. View pictures for more details. Fully functional. Removed from 100% operational ammonia refrigeration system. Not responsible for improper installation. If you don't know what this is and how to install/use it, then you shouldn't buy it.