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Includes Gloss Black and Clear Covers. Functionally, the 8400 Robertshaw thermostat come with all the great features you’d expect. It has a large backlit display – 80% larger than other competitive models. The 8400 operates with 2 AA batteries. And is compatible with all standard 24 VAC heating and cooling systems. Fashionably, the 8400 and 8401 Robertshaw thermostats can blend with any decor using exclusive Stat-Snaps™ (sold separately). You get all of this in a cool new look. We’ve delivered the desired “touch screen” appearance - a flush, smooth, easy to clean face – without the high price of a touch screen. When you select a Robertshaw thermostat, you’ve made the choice of an industry partner that’s been making quality products for over 100 years. Come home to affordable comfort. Come home to Robertshaw. Features and Benefits Stat-Snap™ The custom thermostat cover that applies in a snap. Larger Back Lit Display Makes viewing and setting the temperature easy and accurate. Quick Connect Wiring Fast and easy installation. Uses sturdy wire clamps –no wrap-around of screws. Automatic Compressor Short Cycle Protection A system safeguard. Reduces wear and tear of HVAC equipment. Adjustable Temperature Differential Maintains optimal customer comfort. O & B Terminals Greater system flexibility, zoning compatible. Toll-Free Assistance Toll-Free Technical Service number printed right on the thermostat provides immediate assistance.