General Purpose Refrigeration Temperature / Defrost ControlUniversal panel mount refrigeration controllerPanel cut-out size: 71 mm x 29 mmDirect compressor control through high power 16(8) amp spst relayPower: 115 Volt AC 10%, 50/60 Hz, 3 WattControl range: -50C to +120C3-Digit Multi-purpose Display4 Button keypad to control / program device located below display on the frontConnections on Back of Control: (See Image 2)Screw Terminals S.P.S.T. Normally Open Relay Contacts to Control CompressorScrew Terminals Power Input: Line and NeutralScrew TerminalsTemperature Sensor Input (No Temperature Sensor Included)Data Connector: 4 Pin Male RS485 AT1-5AS5U-AGLAE Electronic Products