This product is an all-in-one tool that provides you with everything you need to know to confidently prepare for the day. The forecaster accurately displays indoor temperature ranges of 32°F to 122°F 0°C to 50°C and outdoor temperature ranges of -4°F to 140° F -20°C to 60°C using alkaline batteries or -40°F to 140° F -40°C to 60°C using lithium batteries. The forecaster also measures humidity and barometric pressure readings in addition to ice alerts, moon phases, and calendar and clock features. Indoor and outdoor humidity and temperature both feature trend indicators as well as min/max recall. For tracking barometric pressure changes, the deluxe forecaster offers a history chart of pressure readings. The base unit can accommodate up to 3 wireless remote sensors and features a colourful backlight display for enhanced readability.