Temperature alerts (indoor/outdoor).
Display: 5.0V AC adapter for primary power; Requires 3 "AAA" Alkaline batteries for backup (not included)
Reception & low battery indicators.
Indoor humidity range: 19 percentage to 97 percentage RH. Temperatures below - 20°F (- 28.8 °C) require Lithium batteries in the outdoor sensor. Forecast tendency indicator. Signal strength icon for sensor transmission