Honeywells FocusPRO 5000 digital thermostat offers the perfect blend of features, performance, energy savings and value. With the largest backlit screen in its class, the FocusPRO 5000 prominently displays both room and set temperature. Precise comfort control (+/-1 deg F) which maintains consistent comfort Easy change battery door - flip out door allows for easy battery replacement without removing or disassembling the thermostat Easy access battery replacement Up to 3 heat or 2 cool conventional and heat pump Terminal designations: R, RC, C, W-O/B, G, Y, W2-AUX/E, Y2-L Fan function: Cycled and continuous