After standing 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 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 / Study Room / 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.