After standing suitable for 5 seconds, the alarm is off, saving you from up. Volume is non-adjustable. Put three AAA batteries, then the alarm can work battery is not included You can connect to computer via USB cable to choose special music you like. It is suitable suitable for office workers and students Contemporary and design, matches with any type of room decoration. LED display shows the time when you step on it and also act as a night light , shutting off after 20 seconds Type: Alarm Clock Display Type: LED with number Movement Type: electronics Thickness: 10mm Applicable places: Office or Study Room or Bedroom colour:Cream white Material:ABS size:39 x 36 x 2cm Package Contents: 1 x Alarm Clock Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: 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.