【Programmable Digital Thermostat】This thermostat features a liquid digital display screen, allowing for easy temperature control. Powered by two 5V batteries, it effectively regulates the start and stop of the boiler to support optimal room temperature. 【Convenient Installation】This thermostat can be easily installed on a wall or placed in a specific location. It is powered by a 5V battery, giving you the flexibility to position it wherever you desire. 【5+2 Weeks Programming】With the ability to be programmed for 5+2 weeks, this thermostat allows for personalized temperature settings based on your weekly schedule, providing comfort and energy savings. 【Child Lock & Antifreeze Function】Equipped with a child lock feature, this thermostat prevents accidental operation by children. Additionally, it comes with an antifreeze function to protect your heating system during cold weather. 【Professional Installation Required】To support safe and proper installation, it is recommended to have a professional install this thermostat. Please remove the protective film on the screen before use. 【Specifications】Material: Plastic+Metal, Color: As Pictures Show, Size: 86 x 86 x 28mm (Approx.), Voltage: Two 5V batteries, Power consumption: (no additional information available)