1.Multiple Temperature Display: This digital room thermometer tracks indoor and outdoor conditions simultaneously with 1 main unit and 2 remote sensors. Displays realtime data for all 3 locations at once, with a strong 328 ft (100 m) wireless range in open areas 2.HighPrecision Monitoring: The indoor outdoor thermometer features advanced sensors for realtime temperature and humidity tracking. Wide measuring ranges: Indoor (9.9°C to 60°C / 14°F to 140°F), Outdoor (40°C to 60°C / 40°F to 140°F), and Humidity (10%99% RH) 3.MAX/MIN Record: Tracks and displays daily MAX/MIN temperature humidity, then automatically resets every 24 hours for updated readings. Features onetouch ℃/℉ switching for convenience 4.Low Battery Indicator: Both the thermometer main unit and sensor are powered by 2 AAA batteries (not included). When the battery is low, the thermometer will display a low battery symbol and remind you to replace the battery