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, BlackPacking included:1 * Wall clock