The 4-pin AMS Lite cable is used to connect the A1 Mini main unit to the AMS Lite device. It has two functions: it supplies the AMS Lite with power from the A1 Mini and enables communication between the two devices. This allows the A1 Mini to control the AMS Lite, read information from the filament spool’s RFID tag, and control the switching and extrusion of multi-coloured 3D printing materials.