Programmable Thermostat,Caslant&trade;Modern Touchscreen Room 5+1+1 Day Programmable Central Air Conditioning 2-Pipe Thermostat Microprocessor-based con LCD Display (black) Note:Please pay attention that our thermostats are just suitable for 2 pipe fan coil unit system of central air conditiong. Heat pump ,gas boiler, oiler boiler geothermal radiant electric heat systems are not available! If you are unsure whether to match your system,before you buy, please contact us to confirm(caslant.ufficio@hotmail.com) One-touch temp control overrides program, internal and external sensor selectable is suitable for any place. Touch Button makes simple operation, large screen display with backlight is easy to readeven in the dark. Precise temperature control of +/-0.5C Degree for consistent comfort, acrylic lenses to avoid the finger scrath. Maximum comfort - Smart Response technology learns the amount of time a system needs to reach a desired temperature and adjusts accordingly Quick and easy installation in 15 minutes or less. 5+1+1 days programmable with 4 program periods per day. Data memory when power is off. It doesn't require a C-wire,it's get power from household electricity. Package Include: 1xThermostat, 2 x Screws, 1 x Manual, 1 x Wall plate