Features: 1. High‑quality plastic material, hard, durable and corrosion‑resistant, and also has long service life. 2. Small, light in weight, easy to install and operate, and can be used without complicated steps. 3. Wide temperature control range, temperature control range is ‑50℃‑110℃, control accuracy is 0.1℃. 4. Sophisticated production, provides stable performance, high work efficiency, can better meet your needs. 5. Comes with a high accuracy sensor, you don't need to buy a sensor seperately, saving your cost. Specifications: Temperature range : -50-110 ℃ Dimensions: 48.5 * 40.1 * 15.8mm Temperature control mode: ON / OFF Resolution: When temperature is 0.1℃, the resolution is -9.9~99.9, other temperature segment is 1℃ Control accuracy: 0.1 ℃ Hysteresis accuracy: 0.1℃ Refresh rate: 0.5S High temperature protection: 0-110℃ Static current: ≤ 35MA, attract current ≤ 65MA Output power: 10A relay Measurement input: NTC (10K 0.5%) Waterproof Sensor Environmental requirements: -10 ~ 60 ℃ , Humidity 20% -85% How to use: Connect the power supply and the load, you can supply to the controller, Is displayed as a measured temperature, Press the SET button, the display flashes the temperature, Press - to set the desired temperature, After setting press SET to confirm return, The controller automatically performs the relay by setting off! Lights, LED status descriptions: Indicator: Off The relay is switched off, Always indicate the relay is closed. LED: Shows LL is the sensor open, showing ?HH is out of range, the thermostat will be forced to close the relay, the display --- as high temperature protection. Package Included: 1 x 12V W1209 Digital thermostat Temperature Control Switch+ Sensor .