Please do not connect the AC contactor! The factory is now upgrading the PCB board, so both 110-220V and 220V will use the same This product cooperates with two factories: So you get a different appearance from the product link picture, but the usage is the same The product cable uses a fixed range size, if you need to use more than the data range, you can re-solder the new cable you need, if you care, please don't buy it! Item type: Digital temperature controller Model: XH-W3001 Output Type: Direct Output Output capacity:10A max Power Supply: DC12V,DC 24V,AC 220V Load power:120/240/1500W Temperature Measurement Range: -10 C~110 C Temperature Control Range: -10 C~110 C Temperature Control Precision: 0.1-0.2C Input measurement: NTC10K waterproof probe L = 1 meter waterproof How to set 1. Press up button show the starting temperature. 2. Long press UP button the temperature display Flashing , Press the UP or Down button. 3. Set the start temperature value. 4. Press Down button show the Stop temperature. 5. Long press Down button the temperature display Flashing , press the UP or Down.