fan coil thermostat;wireless thermostat; LCD thermostat; electric heating thermostat; The KTH601F series thermostat is a wirless thermostat to control 2-pipe or 4-pipe fan coil unit and controller that can be placed anywhere at your home, office. The KTH601F thermostat pack consists of a room thermostat and a relay box (receiver unit). No wiring to the room unit is required. The installer only needs to wire the relay box to the controlled device (e.g fan coil unit) and mount the room unit in a suitable location where RF communication is reliable. The KTH601 thermostat uses reliable RF communication technology in the 433MHz band. The KTH601F extra large LCD display, symbol display. The unit is ideal for consumers who want reliable and precise temperature control from a modern looking, simple to program and easy-to-use product. 2. Features Transmits up to 30 meters through walls and floors Communicates at 433 MHz for interference free operation Works with s 2-pine or 4-pine fan coil unit Programmable up to 4 periods daily, which can be customized for each day of the week Programming is retained in memory even if the battery is off power LCD Backlighting to illuminate the display for easier viewing in low light condition Backlit display for easy nighttime viewing (automatically turns off after 6 seconds of non-use) Display either Fahrenheit or Centigrade Battery life is approximately 6 months with normal use and rechargeable by USB cable Thermostat can be installed without disrupting your room structure OFF status has an integral frost protecting setting at minimum 5 (installer adjustable) so that pipes in the house will never freeze in winter Low battery indicator 3.Thermostat Technical Data Temperature Range 5 35Switching DifferentialApprox 1Power SupplyRechargeable Li-Battery by USBSensing ElementNTC 10KOperating Temperature0 45Storage Temperature-20 55Operating Humidity590%Dimension135×95×15.5 mm (W×H×D) 4. Controller Technical Data Power Supply 230VAC 10%, 50/60HZSwitch TypeSPSTOutput Rating20-230VAC. 0.8A in run.5A in rushWire AccessFrom the rear(Wall box mounting), right and bottomStorage Temperature-20 55Operating Humidity590%Dimension116×98×45 mm (W×H×D) 5. RF RF operation band ISM(433)MHZ, 1% duty cycleRF communication range30 meters in a residential building environmentRF communication technologyShort, high rate transmission to minimize air time and avoid collisionsBlocking immunityReceiver class 2RF binding methodFactory pre-bound with the room unit