The Rex DD-4-C Type C Precision Digital Shore Durometer RX-DD-C for Medium Hard Elastomers and Plastics is ideal for laboratory use. It features a large direct drive LCD display, RS232 data ports for computer compatibility, a locking feature to prevent accidental erasure of tolerances, automatic shutoff, low battery warning, and accessories such as MTI and SPC type printers, audio attachments and software. The RX-DD is supplied as a complete kit including the durometer, AC adapter & instruction manual in a foam-fitted metal carrying case.