Brand new and high quality Quantity: 1PC Color: As picture shows Size: 48mm*40mm (L x W) Function: Temperature Control Range: -50 ~ 110 ℃ Resolution: 0.1℃ (-9.9 to 99.9), 1℃ for other temperature ranges Temperature Measurement Accuracy: ±0.1℃ Control Accuracy: ±0.1℃ Hysteresis Accuracy: ±0.1℃ Refresh Rate: 0.5 S Power Supply: DC 12V Measurement Input: NTC (10K 0.5%) waterproof sensor Environmental Requirements: -10 ~ 60 ℃ Humidity 20% -85% Power Consumption: Static current: ≤10MA, Current: ≤65MA How to Use: Connect the power supply and the load, then power the controller. The measured temperature is displayed. Press the SET button; the display will flash the desired temperature. Press + or - to set the desired temperature. After setting, press SET to confirm and exit. The controller will automatically activate the relay based on the set temperature! Indicator Lights (LED Status Descriptions): Indicator: OFF means the relay is off, ON means the relay is closed. LED: LL indicates the sensor is open. HH indicates the temperature is out of range, and the thermostat will force the relay to shut off. --- displays high-temperature protection. Parameter Function: Long press SET for 5 seconds to enter the main menu settings. Press + / - to switch between PO...PS. Press SET again or wait 10 seconds of inactivity to confirm and return to the controller. Note: Due to differences in monitors, the picture may not reflect the actual color of the item. Thank you!