Conventional and heat pump programmable, 1 heat/1 cool thermostat with R, Rc, C, W (O/B), Y and G terminals. Provides electronic control of 24-volt (AC) conventional and heat pump systems or 750-millivolt (mV) heating systems. Honeywell's FocusPRO® 6000 large size display (5.09-square inch) digital thermostat offers the perfect blend of features, performance, energy savings and value. With the largest backlit screen in its class, the FocusPRO 6000 prominently displays both room and set temperature. Programmable to 5-1-1 (weekdays, Saturday, Sunday) or 5-2 (weekdays, weekend). Stages: 1 heat/1 cool conventional or heat pump. Large, clear, backlit display is easy to read in various lighting conditions. Display is available in large screen or standard size. Precise comfort control (+/-1F) maintains consistent comfort to the highest level of accuracy. Simplified programming and operation. Easy change flip-out door battery allows for easy battery replacement without removing or disassembling the thermostat. Built-in instructions with simple, pull-out instruction manual. Adaptive Intelligent Recovery™ ensures programmed temperature is reached by programmed time. Temperature range stops prevent user from setting temperature too high or too low.