1. The screen is displayed at a glance 2. There is a back light button on the top, which can be opened by gently pushing from top to bottom. 3. Folding bracket design, can be placed on the desktop, or can be hung on the wall 4. Function description: temperature display, humidity display, historical maximum and minimum temperature humidity record within 24 hours, alarm clock function, time function, date display, button top backlight 5. Use battery: 2 no.7 battery 6. Size: 130x75x22mm

http://olla.gr/mc501-adjustable-indoor-thermometer-hygrometer-upgrade-version/