1.Motion activated backlight function 2.Large indoor/outdoor temperature andhumidity display with trend 3.Indoor temperature range : 14°F-122°F(-10°C-and50°C) 4.Outdoor temperature range : -40°F-140°F(-40°C-and60°C 5.Humidity range : 1%RH-99%RH 6.Up to 3 RF channels for outdoor sensors (only one sensor included) 7.Max/Min temperature and humidity records within 24 hours(in and out) 8.Comfort level indication 9.°C/°F switchable 10.Wall hanging, table standing or magnet attaching 11.Low battery indicator 12.White backlight for 8 seconds Colour:black/White Material:plastic Package Contents: 1x Digital Hygro-thermometer 1x Remote Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.