LARGE LCD DISPLAY: The digital thermometer and hygrometer adopts a blue backlight and 4.6inch large display screen with large bold font display. It can also display the temperature and humidity of the main unit and 3 transmitters on the same screen, and the reading is clear at a glance. MULTI-FUNCTION DISPLAY: Humidity temperature gauge features face icons to indicate DRY/COMFORT/WET air condition quickly. MULTIPLE INSTALLATION METHODS: Wall thermometer features tabletop, wall-mountable and magnet-mountable design, convenient mounting feature for every type of kitchen, greenhouse, guitar room, office and cellar. Comfort Level Indicator: Dry (RH Less than 40%) Comfortable (RH 40%-70%) Wet (RH 70%) Frequency:433 MHz Update Rate:60 s Transmission Range:100M/328ft (open area) Indoor: Temperature Range:-20-70(-4-158) Humidity Range:10%-99% Outdoor: Temperature Range:-50-70(-58-158) Outdoor Humidity Range:10%-99% Accuracy: 1; 5% (only guaranteed between 20 to 90%) Resolution:0.1;1 % Display Console:3 x AA 1.5V Alkaline batteries (not included) Remote Sensor:2 x AAA 1.5V Alkaline or Lithium batteries (not included) Notes: Don't disassemble the product freely. While the indication is blurring, please change the battery. Don't put this product in the place where it is hot, humid, dusty or full of gas, in case that its electronic components are damaged. It will not alarm at once when temperature exceeds pre-set. It will compare the temperature after 10 minutes. And when temperature reaches alarm value, the thermometer will alarm immediately.Tips: The product may be updated constantly, Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:White Material:Plastic Package Contents: 1 * main unit 3 * 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.