Digital Temperature Controller Dual Relay Output Thermostat with Negative Temperature Coefficient (110V - 220VAC) Features: 1. ABS flame retardant plastic shell, more safe e. 2. Microcomputer intelligent digital display thermostat, wide temperature measuring range.  3. With Negative Temperature Coefficient Sensor for convenient usage, line length is about 1 meter. 4. The large and clear digital display shows measuring temperature, high accuracy of temperature measuring and controlling. 5. Suitable for automatic switching of refrigeration and heating devices such as seafood machines and cooling water machines.   Specification: Item Type: Temperature Controller Optional Voltage: 12V/24V/110V - 220VAC Temperature Control Range: -55°C - 99°C Machine Power Consumption: Less Than 3W Temperature Measurement Accuracy: ±1 °C (-50 °C ~ 70 °C) Resolution: 0.1 ° C Sensor: Negative Temperature Coefficient Sensor (line length is about 1 meter) Ambient Temperature: 0~60°C Relative Humidity: 20%~85% (no condensation) Machine Size: Approx. 75 x 34.5 x 85mm / 3 x 1.4 x 3.3in Installation Opening: Approx. 71 x 29mm / 2.8 x 1.1in Housing Material: ABS flame retardant plastic shell   Package List: 1 x Temperature Controller     Note: Please allow slight 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.