We discount for large quantity. Welcome to contact with us Automatic conversion of cooling and heating mode Control mode of the return difference; Temperature display resolution 0.1 The temperature controller has the characteristic of high precision, high sensitivity, high stability. Supports temperature correction and support for energy loss (the parameters of the sudden power failure are still valid The application range is like the temperature control of the home, farm, cold storage, greenhouse, aquarium, etc. Screen type: Digital STYLE: Foot station Temperature sensor NTC 10 K Lord Length: 1.0 m Temperature measurement range: -55 °C ~ 120 °C Resolution: 0.1 °C Accuracy: ± 1 °C Power supply: 110-220VAC 50 / 60Hz Power consumption: Less than3 W Storage temperature: -30 °C ~ 75 °C Relative Humidity: 20% ~ 85% (without condensation) Relay contact capacity: two Cool relay 10A / 240VAC; Heat 10A / 240VAC Colour:black Material:plastic Size:85.5*75*34.3(mm) Package Contents: 1* thermostat 2* temperature probes Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.