CAN Extension is the convenient tool that allows you to remote either Data key and MemoryKey sockets so to have them in a more comfortable position. Loggers (MyChron4 660 or MXL QM or EVO3 QM) in fact are often installed on the vehicle with the sockets hardly reachable or not reachable at all. Thanks to CAN Extension, you only need to plug CAN cable in your logger, connect the Data key/MemoryKey to the extension socket and... no more connection problems.