Weekly Programming Thermostat with LCD Screen, it is possible to set 6 perids called events each day with different temperature Also you can select " temperature control mode " or " manual mode " according to your requirments The thermostat is recommended for the control of electric heating devices or on/off valve actuator used in water-based heating system. Technical Data: Voltage: AC 230V 50-60Hz Power consumption: 2VA Setting range: 5 - 90 Celsius Limitation range: 5 - 99 Celsius ( factory setting : 35 Celsius) Accuracy of temperature measurements : 0.5 - 10Celsius adjustable, (factory setting: +/- 1Celsius) Ambient temperature: -5 - 50Celsius Protecting grade: IP20 colour:White Material:plastic size:86 x 86 x 12mm Package Contents: 8 x LCD Programmable Temperature Controller 8 x sensor 16 x screw Only the above package content, other products are not included. Note: Light reflection 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.