Features: -- Time, humidity, and temperature are displayed on the same screen, and the date is displayed by lightly pressing the button; 12/24 hour system. -- There are two installation methods, which can be placed directly on the desktop, and there are wall hanging holes on the back, which can be hung on the wall. -- Use USB plug-in or bring your own 3 AAA carbon batteries(not included battery). Specification: -- Name: Alarm clock -- Material: ABS -- Power supply: USB Plug in or 3*AAA battery (not included) -- Size: 20.2 x 2 x8cm -- Color: White, Black Packing included: 1 * Wall clock