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.Features: It uses high reliability single chip which has excellent performance and strong anti-interference ability. Children lock protection for preventing kids from misoperation. Data memory function when there is power failure. Holiday mode allows you enjoy a more comfortable temperature when go home from holiday. Easy to operate, You can also use the button on the thermostat to set different working modes. Specification:Condition: 100% Brand NewMaterial: ABS, PlasticColor: WhitePower Supply: 2*AA Battery(not included)Power: <0.3W Load Current: 3A(Water Heating)Temperature Diaplay Range: 0- 40°CWorking Temperature: 0- 90°CAccuracy: ±0.5℃Set-point Temperature Range: 5℃- 35℃ Output: Switch RelayProbe Sensor: NTC（10K）1%Contact Capacity: 5A Boiler HeatingRunning Program: Set per 1 week as a cycleSize: approx. 8.6*8.6*2.9cm/3.39*3.39*1.14inWeight: approx. 170g/6ozPackage 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. 3.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering