Easy to read LCD screen displays the current of indoor outdoor temperature. When insufficient electricity, there are will be shown on the LCD screen. With an trend indicator temperature and daily high and low information. Display stands upright for desktop use or wall mountable. Includes 24 hours of high and low temperature records. The display console displays the temperature, minimum and maximum temperature, which can be manually reset. Technical : Alarm duration: 2 minutes Wireless Detection Distance: 100 Meters Indoor Temperature Range: -10 ~ 60 Outdoor Temperature Range: -50 ~ 70 (-50 ~ 158 ) Humidity Range: 20% -99% Accurate Temperature: +/- 1 Accurate Humidity: +/- 5% Power Supply: Host: 3 * AAA Battery, Each Sensor: 2 * AA Battery (Not included) Note: 1. Do not install the reverse protective battery. 2. Do not put the receiver close to metal. 3. Avoid transmitter directly in the rain. 4. High-quality batteries for main unit use and better transmitter. 5. The sensor search mode allows you to re-sync sensors without removing and re-inserting the batteries. Colour: white Material: plastic Package Contents: 1 * Host 3 * Sensor Only the above package content, other products are not included. Note: Light 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.