● Weekday/Weekend programming - 5-2 (Weekdays, Weekend) programming. ● Backlit digital display - both current and set temperatures are easy to read in various lighting conditions. ● Precise comfort control [+/-1 F (+/- 0.5 C)] - maintains consistent comfort to the highest level of accuracy. ● Basic operation - easy-to-use slide switches allow you to select the heat or cool mode, and operate the fan. ● Built in instructions - simple, pull out instruction manual. ● Adaptive Intelligent Recovery - ensures programmed temperature is reached by programmed time. Description：Electronic Programmable Thermostat Application：Heat Pump Systems Programmability：5-2 Day Program Changeover：Manual Color：Premier White Switch Positions (System)：HEAT-OFF-COOL-EM. HT Switch Positions (Fan)：AUTO-ON Power Method：Dual Powered: Battery or Hardwire Terminal Designations：R, Y, AUX, E, G, O, B, L, C Dimensions (in.)：3 13/16 in. High X 5 3/8 in. Wide X 1 1/4 in. Deep Dimensions (mm)：97 mm High X 137 mm Wide X 32 mm Deep Mounting：Horizontal Electrical Ratings：20 to 30 Vac or 750 mV Frequency：50 Hz Frequency：60 Hz Operating Temperature Range (F)：32 F to 120 F Operating Temperature Range (C)：0 C to 48.9 C Setting Temperature Range (F)：Heat: 40 F to 90 F; Cool: 50 F to 99 F Setting Temperature Range (C)：Heat: 4.5 C to 32 C; Cool: 10 C to 37 C Differential Temperature (F)：± 1 F Differential Temperature (C)：±0.5 C Stages：2 Heat/1 Cool Heat Pump Sensor Element：Thermistor Heat Current：0.02 A to 1.0 A running Cool Current：0.02 A to 1.0 A running Operating Humidity Range (% RH)：5 to 90% RH, non-condensing Display Size：1.73 sq. in. Voltage：20 to 30 Vac