Prestige® high-definition thermostat, color, touch-screen, redefines how a thermostat can look and function. Easiest-to-use programmable thermostat available. RedLINK enabled line includes seven-day programming wizard, multi-language options and USB setup, and customizable service reminders. UN-3091 lithium metal batteries packed in/with equipment. For up to 2 heat/2 cool conventional systems or up to 3 heat/2 cool heat pumps. Dimensions: 3-15/16 inch high, 6-7/8 inch wide, 1-1/2 inch deep (100mm high, 175mm wide, 38mm deep). Includes high-definition color touchscreen thermostat. Use with RedLINK™ enabled thermostats and accessories. Tri-lingual display offers choice of English, French or Spanish. Electrical ratings: 18 to 30-volt (AC). Frequency: 60Hz; 50Hz. Color: Arctic White. Seven-day multiple day programming or non-programmable. Display size: 8.06 square inch. Auto or manual changeover. Setting temperature range: heat, 40F to 90F; cool, 60F to 99F (heat, 4.5C to 32.0C; cool, 15.5C to 37.0C. Humidification setting range: 40 to 80% (cooling) Relative Humidity (RH); 10 to 60% RH (heating). Dehumidification setting range: 40 to 80% RH. Extra sensor (outdoor) optional.