1. 【Indoor and Outdoor Temperature】 - HD LCD display simultaneously monitors indoor outdoor temperature, providing you accurate data on real-time temperature and temperature trend. Indoor temperature: 0-50 ℃ / 32 -122 ℉, Outdoor: -30-50 ℃ / -22-122 ℉ 2. 【With Wireless Sensors, More Professional】 - With integrated console and remote sensors, displays the indoor and outdoor temperature simultaneously. You can place the sensor in different environments, having more options. It is more professional and advanced than other products in the market 3. 【Min / MAX, Trend, ℃ / ℉】 - Unit will display temperatures and maximum and minimum, which will help you better read your living condition, the "max / min" button is on the back. Also will show the temperature trend, it is good for your family, kids and the elder. Temperature accuracy: ± 1 ° C; You can change the temperature display mode by simply pressing the "° C / ° F" button on the back 4. 【Battery Powered & Intimate Service】 - The main unit requires 2 * AAA batteries (not included); Wireless sensor 2 * AAA batteries (not included). 5. 【Unique Round Design】 - Black / White color, with sensor, 2pcs for your pereference. Main unit Dimension: 9.4 x 9.4x 3.8cm, Wireless sensor: 3.7x 2 x 10cm. lightweight and portable. You can place the main unit on a table or hang it on the wall, by hanging the sensor on the wall