The 9560 Series thermostats comes with auto changeover. This feature automatically switches between heating and cooling to maintain optimal comfort. Coupled with adjustable differentials, the series will automatically maintain a comfortable environment year round. To enhance readability, the 9560 Series is equipped with a large back lit display. In addition, our illuminated LED system indicators clearly identify the heating or cooling cycle. Energy saving features such as residual heat/cool and temperature limiting set points are also included. Features: 2 Heat / 2 Cool with Auto Changeover Compatible with all standard 24 VAC multi-stage heat pump systems Adjustable 1st and 2nd stage differential Worry-Free Memory Storage Multi-colored LED System Indicators Large Back Lit Display Specifications: Voltage: 24 Volt AC (18-30 VAC), 50 or 60 Hz. Current: 1 amp max. load per terminal Dimensions: 5.5" W x 3.75" H x 1.25" D Terminations: C, R, W1, W2, Y1, Y2, G, O, B