All features: Weather forecasting icons based on changing air pressure. Measures indoor and outdoor temperature in F. Barometric pressure tendency arrow. Includes (1) TX6U wireless remote sensor with transmission range of 80' (unobstructed). Up to 3 remote sensors can be used with this unit. Indoor temperature range 32 F. to 140 F. Outdoor temperature range -21.8 F. to 157.8 F. Temperature accuracy +/- 2 F. Main unit powered by 2 ''AA'' alkaline batteries (not included). Remote sensor powered by 2 ''AA'' alkaline batteries (not included). 1 year manufacturer limited warranty.