Specifications: Luminance of time automatic convert at day or night. High definition makeup mirror, when pressing "Down" button in the back, the screen display will turn off, and can be used as a mirror. Automatic screen protection, voice control brighten the screen, convenient to awaken the time display. Three alarm settings during one day to meet your different needs, single alarm time is 1 minute, and you can press any key to shut down. Two display modes: DP-1: 10s time display, 3s month/day display, 3s temperature display; DP-2: long time clock display. Item Name: Alarm Clock Material: ABS Power Supply: 3 x AAA Batteries (Not Included) or USB Powered Features: Portable, Voice Control, Brightness Adjustable, HD Makeup Mirror Size: 8cm x 8cm x 3.6cm/3.15" x 3.15" x 1.42" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Alarm Clock 1 x USB Cable