Honeywell 2-Stage Non-Programmable Digital Thermostat model TH5220D1029 Precise Temperature Control maintains consistent comfort to the highest level of accuracy. Soft-Key Controls  are easy to use. Large, clear Back-Lit Digital Display  easy to read in various lighting conditions. Easy-Access Battery Replacement  flip-out door allows for easy battery replacement without removing or disassembling the thermostat. Display Size Options  available in large screen (shown) or standard.