LuxPro PSPA722 Programmable (7 day) Multistage Thermostat COMPATIBLE WITH: - Up to 2 Stage Heat / 2 Stage Cool Gas, Oil or Electric Systems - 1 Stage Heat /1 Stage Cool Heating and Air Conditioning Systems, Gas, Oil, Electric or Heat Pump - Low Voltage (24 Volt) Systems - 2 Wire Hydronic Systems - Single Stage Heat Pumps NOT COMPATIBLE WITH: - 3 Wire Hydronic System - Line Voltage System (without transformer) FEATURES: Autochangeover Fully Programmable IAQ Clean Cycle® Intermittent Fan Programmable Auto Changeover Dead-Band (1°F to 6°F) 7 Day Programming - 4 Periods Per Day Easy Programming with Lux Speed Dial Dual Power - System or Battery Powered with Battery Free Memory Storage Programmable Filter Timer with Change Filter Indicator Temporary Override is CAT24 Compliant Vacation Override Adjustable 2 or 5 Minute A/C Compressor Delay Energy Usage Monitor EL (Electro Luminescent) Back Light Display Mode and Fan Slide Switch Optional Early Recovery Energy Star Compliant Batteries Included 1-Year Warranty F/C Selectable 12/24 Hr Clock Temperature Calibration Multi-Stage Adjustable Temperature Differential/Cycle Rate (.25 - 2.25) Programming Copy Button Keyboard Lockout Speed Dial® Reprogramming High Efficiency Systems Contractor Grade On-Screen Low Battery Indicator Soft Touch Buttons Default Energy Star Approved Program Separate Temperature for Heating & Cooling Hold Constant Temperature Override Audible Keypad Entry Response DIMENSIONS: 5.90" (150mm) wide x 4.13" (105mm) tall x 1.18" (30mm) deep SPECIFICATIONS: Heat/Cool Terminals: RH, RC, O, B, W1, W2, Y1, Y2, G, Electrical Ratings: 11/2 AMPS at each terminal, 2 AMPS total Powered: 2 "AA" Batteries . Temperature Control Range: 45°F to 90°F (7° to 32°C). Operating Humidity: 20% to 90% non-condensing. Operating Temperature: +32°F to +122°F (+0°C to +50°C). Storage Temperature: -4°F to +140°F (-20°C to +60°C). Electrical Immunity: meets relevant CE specifications.