This thermostat is made of quality material, durable and safe to use. It is easy to install and convenient to use. Features children lock function to prevent from misoperation and data memory fuction when there is power failure. Specification: Condition: 100% Brand New Material: ABS, Plastic Color: White Power Supply: 2*AA Battery(not included) Power: <0.3W Load Current: 3A(Water Heating) Temperature Diaplay Range: 0- 40°C Working Temperature: 0- 90°C Accuracy: ±0.5 Set-point Temperature Range: 5- 35 Output: Switch Relay Probe Sensor: NTC10K1% Contact Capacity: 5A Boiler Heating Running Program: Set per 1 week as a cycle Size: approx. 8.6*8.6*2.9cm/3.39*3.39*1.14in Weight: approx. 170g/6oz Package List: 1 * Thermostat(Battery Not Included) Note: 1. Please allow 1-3cm 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.