A3900 Series Wireless Thermostats

The A3900 wireless thermostat allows homeowners to automate their home's temperature controls through the use of bi-directional controls. Attractive, ultra-slim, ultra-modern styling: Heat pump, gas, oil and electric boiler heat compatible for up to 2 heat, 2 cool systems. 7days /5+2 programmable. Rechargeable Li-battery and recharged by universal USB bring the convenience. Large, backlit display LCD is easy to read. Optional Horizontal or Vertical mounting are easy to install. Reliable RF communication. Armchair programmable design is more convenient to operate.Features Transmits up to 30m, through walls and floors Communicates at 433 MHz for interference free operation Works with single or dual stage gas/electric systems, heat pumps, or hydronic systems Programmable up to 4 time periods daily, which can be customized for each day of the week Auto changeover from heating to cooling, with adjustable "deadband" Backlit display for easy nighttime viewing (automatically turns off after 8 seconds of non-use) Displays either Fahrenheit or Centigrade Wireless thermostat uses rechargeable Li-battery. 24VAC power supplied Controller Install yourself if you are familiar with installing a standard HVAC thermostat Designed for use with 24VAC heating/cooling systems A3900 Wireless ThermostatsAdditional Features Auto Changeover, 2-Stage Heat & 2-Stage Cool for use with gas /oil /electric boiler or heat pump systems. Thermostat is completely wireless, receiver can be mounted at unit or at old thermostat's location Transmits at 433MHz using pulse code modulation--- won't interfere with other wireless systems Rechargeable Li-battery. 7 Day Programmable with 4 time periods per day and holiday mode Dual-setpoint with deadband and temperature sensor. All programming stored in nonvolatile memory. Display shows heat or cool setpoints, mode, and room temperature simultaneously. 4 minute compressor time guard and adjustable cycle limit, both overrideable for servicing equipment Setpoint adjustment range from 40°F to 99°F. Complicated address mode based on automatic Recognition