Made of high-quality material, sturdy, anti-scratch, and anti-corrosion. Multiple installation methods, it can be hung on the wall or placed on the table to meet your different needs. Support alarm function. When the temperature exceeds the maximum, this device can remind you to ensure safety. Time display: The default power-on display is AM12:00 (12-hour and 24-hour formats are switchable, with 12-hour format as the default). Calendar display: The default power-on display is January 1, 2020, AM12:00; the default date display format is MD. The weekday language is available in eight languages, and the setting order is as follows: EN (English), GE (German), IT (Italian), FR (French), NE (Dutch), ES (Spanish), DA (Danish), RU (Russian). The default display at power-on is EN (English). Indoor temperature display: 0C to 50C (32F to 122F), with an accuracy of 1C; outdoor temperature display: -50C to 70C (-58F to 158F), with an accuracy of 1C. Indoor humidity display: 20% to 99%; outdoor humidity display: 20% to 99%. Switchable temperature units: C/F. Default display unit: Temperature [C]. Maximum/minimum indoor and outdoor temperature and humidity values recorded. Three-level arrow indicators for indoor and outdoor temperature and humidity trends. Three-level graphical display of indoor and outdoor temperature and humidity comfort levels. Audible alarm when indoor temperature and humidity upper/lower limits are exceeded. Backlight color when indoor temperature and humidity upper/lower limits are exceeded: orange backlight indicates upper temperature and humidity limits; Red backlight indicates lower temperature and humidity limits. Three-channel outdoor temperature and humidity data displayed on the screen. Temperature and humidity calibration function. Wireless transmission range: 100 meters outdoors. Screen size: 4.72 inches. Housing material: ABS. Power supply: Receiver: USB data cable/3 AAA batteries; Transmitter: 2 AAA batteries. Note: Batteries not included. Dimensions: Receiver: 12.5*2*12.5 cm; Transmitter: 5*3.7*10.5cm Note: The data are all measured manually, please allow an error of 1-3cm. Due to differences in light and display, there may be some color differences, please refer to the actual item received.