Prestige® 2.0 high-definition comfort system kit, RedLINK™ enabled. Prestige redefines thermostat look and function, and is easiest-to-use programmable thermostat available. RedLINK-enabled line includes seven-day programming wizard, multi-language options and USB setup, customizable service reminders. UN 3091 lithium metal batteries packed in/with equipment. Stages: up to 2 heat/2 cool, conventional systems; up to 3 heat/2 cool, heat pumps. Includes THX9321R5030 Prestige 2.0 HD thermostat; REM5000R1001 portable comfort control; and C7089R1013 wireless outdoor air sensor. Use with RedLINK™-enabled thermostats and accessories. Tri-lingual display; select for English, French or Spanish. Seven-day multiple-day programming or non-programmable. Hardwired. Auto or manual changeover.