Standard Features - Large, Clear Backlit Digital Display - Easy-to-read in various lighting conditions. (Also available in smaller standard screen size) - Precise Comfort Control Maintains consistent comfort to the highlest level of accuracy. - Wireless Thermostat Can be placed anywhere in the home - Works With Portable Comfort Control Allows you to sense/adjust temperature from anywhere in the home - Wireless Outdoor Sensor Allows you to see outside temperature and humidity on the thermostat or Portable Comfort Control - 5-1-1 Programming Programming for the weekdays, Saturday and Sunday - Easy-Access Battery Replacement Flip-out door allows for easy battery replacement without removing or disassembling the thermostat. - Built-in Instructions Simple, pull-out instruction manual. - Model Numbers: YTH6320R1015, YTH6320R1009, YTH6320R1001 - 5-Year Warranty