Programmable Timer: Using the inbuilt timer, your controller has a weekly programmable power schedule that suits your needs, helping you save the environment, and save money. Easy to read & adjust: The high brightness LCD display back-lighting makes your controller easy to read no matter the light level. All functions can be easily set with a tap of the six touchscreen buttons. Clear Display: Clear and concise display, provides all useful information at a single glance, including current time, automatic timer power on and off, temperature, fan speed, and it even tells you when your filters need cleaning! Compact Design: For the space or design conscious, this controller does not get in the way. Measuring only 86x86x40mm ensures that you will only see it when you want to. High Quality & Tested Performance : Ventilation Megastore products are quality tested, so you know you're buying the best heat recovery ventilation system available.