TR8100AC touch screen thermostat Programming Choice of 7 day, 5/2 day programmable or non-programmable (installer selectable); 4 time and 4 temperature settings per day; pre-programmed or personalized schedule; Energy savings up to 33% Display Large, 4.3-inch touchscreen display; Blue, lighted display for easier low-light viewing; Larger, easy-to-read character size; Extra-large touch keys for easy operation; Clean, uncluttered touchscreen display provides easier navigation. Comfort & Convenience Intuitive menu-driven set-up, programming and operation, with audio prompt to confirm touchscreen entries; Permanent program retention during power loss; Enhanced touchscreen security prevents tampering. Room temperature display can be recalibrated up to +/- 4°C; Temperature display resolution: 0.1 C; Temporary temperature override; C / F temperature format selection by buttons; Available in white and silver plastic finishes Specifications * Power supply: 230VAC (120VAC optional) * Inputs: 1x NTC10K built-in temperature sensor * 1 x heat output, 1x cool output, high, medium,low ,auto fan speed output * Ambient temperature: 0 °C [+32 °F] ~ +45 °C [+113 °F] * Operating RH: 0~95% (non condensing). * Dimensions:127mm x 95mm x22.5mm * Backlight life: 5,000 hours. * Battery type: CR 1220 (Backs up clock only) * Battery life: > 5years (10 years Maximum)