Honeywell PRO 4000 Programmable Thermostat, Low Voltage, 40 - 90 deg F Heat, 50 - 99 deg F Cool, 2 deg F Differential, 2 Stages Heat, 1 Stages Cool, Temperature Settings Per Day: 4, Programs Per Week: 5-2, Terminal Designations: R, C, Y, G, O, B, AUX, E, L, System Switching: Heat-Cool-Off-Emergency, Fan Switching: Auto-On, Backlit Display, 20/30 VAC, 50/60 Hz, Battery/Hardwired, Horizontal Mount, Premier White, 1-1/4 Inch L x 5-3/8 Inch W x 3-13/16 Inch H, Includes: Subbase
This model has been discontinued, Honeywell model TH6210U2001 is listed as the replacement