Feature: 1. This temperature controller thermostat is a heating and cooling relay output. 2. The thermostat sends out an alarm when the temperature exceeds the temperature limit or the sensor is wrong. 3. This digital temperature controller has 2 temperature set points and is easy to use. 4. The temperature controller can save all parameters after a short circuit, and the refrigeration control output delay protection. 5. Used in aquarium, pet farms, home freezers, incubators, barbecue grills, water tanks, refrigerators, industrial coolers, steamers, industrial equipment and other temperature control systems. Specification: Item Type: Temperature Controller ThermostatTemperature Measurement Range: -40~100℃ Product Voltage: 220V 50/60hz Temperature Control Range: 16~42℃ Measurement Accuracy: ±1℃; ±5% Display Resolution: 0.1℃; 0.1% Input: Temperature and humidity sensor Product Power Consumption: ≤3W Working Environment Requirements: Temperature -10~60℃; relative humidity 20~85% (no condensation)Size: Approx. 92mm / 3.6in50mm / 2in 70mm / 2.8in 178mm / 7inWeight: Approx. 586 g / 20.7 oz. Package List: 1 x Controller2 x Stickers1 x User Manual Note: 1. Please allow 0‑2 cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.