This is a second-hand ST-3600 Tension Controller, removed from working machinery and in good condition. It was fully operational prior to removal and is suitable for applications such as printing, packaging, textile, and paper processing, where precise tension control is required. The unit operates on AC 180–260V, 50/60 Hz input and provides an output of DC 0–24V, up to 4A max. It includes a front panel display with program, manual/auto mode, and adjustment controls for easy setup and operation.