Large, Clear Backlit Digital Display - Easy-to-read in various lighting conditions * Precise Comfort Control - Maintains consistent comfort to the highest level of accuracy * Easy-access Battery Replacement - Flip-out door allows for easy battery replacement without removing or disassembling the thermostat * Energy Savings - Program to save up to 33% on annual heating and cooling costs (if used as directed. Saving may vary depending on geographic region and usage)