Programmable Thermostat Temperature Controller for Wall hung Boiler Heating System Black Description: This heating thermostat can get room temperature via sensor and compare with thermostat setting temperature to help achieving comfortable temperature environment. It is widely used for the electric heating equipment and wall-hung boiler heating system. Features: and temperature thermostat for water heating system. It can be programmed per week as a cycle, so as to provides much convenience. LCD display with blue backlight protects your eyes, ensures easy-reading and helps to get the information quickly. The middle control button can be rotated to regulate the temperature and can be pushed for "OK" as well. Widely used for the electric heating equipment and wall-hung boiler heating system. Specifications: Condition: Material: Plastic Color: Black, White(optional) Display Accuracy: 0.5℃ or 1°F Probe Sensor: NTC(10K)1% Contact Capacity: 5A  Operating Environment Temperature: 0~50°C/32~122°F  Temperature Adjustment Range: 5~35°C/41~95°F  Temperature Display Range: 0~40°C/32~104°F  Output: Switch Relay  Insulating Condition: Normal environment  Running Program: Set 1 week as a cycle  Installation: Wall mounted or on battery seat  Application: Wall-hung Boiler Heating System Battery: 2 * AA 1.5V Batteries(Not Included) Certificate: CE, RoHS Size: As Picture Shown Weight: Approx. 300g Package Included: 1 * Thermostat with Screws Notes: 1. Please cut off the power before installing to prevent electric shock or equipment damage. 2. Please install it at 1.5m from the ground. 3. Please be carefully not to install it in the corner of the wall, door/window edge or behind the door, etc. Avoid hot / cold air  pipes, radiators, chimneys or hot ducts.