Program your weekdays and weekends separately for tailored comfort and energy savings Enjoy the exclusive Lux speed dial for quick and easy programming Program up to 4 periods per day with separate programs for heating and cooling, maximizing comfort and efficiency Not Compatible With-Multi-stage heat pumps, Multi-stage gas or oil furnaces, 3 wire hydronic systems,120V/240 line voltage systems (without transformers) Features keyboard lockout and temperature control from 45°F to 90°F (7°C to 32°C) for precise comfort management Product Details Brand: LUX Model Name: PSP511LC-010 Product Dimensions: 5"D x 3.25"W x 1.5"H Controller Type: Mechanical knob Special Feature: Low Voltage Color: White Specific Uses For Product: Air Conditioner Temperature Control Type: Heating and cooling Included Components: PSP511LC-010 Programmable 5-2 Day Thermostat Power Source: Battery Powered Voltage: 24 Volts Material: Plastic Shape: Rectangular Display Type: Digital Control Type: Button Control Mounting Type: Wall Mount Style: PSP511LC Backlight: Yes Specification Met: Energy Saving Thermostat Number of Batteries: 2 AA batteries required. (included) Manufacturer: EME Delaware Item Weight: 9.1 ounces Item model number: PSP511LC-010 Batteries: 2 AA batteries required.