Specifications: After the wake-up alarm rings, tap the "sleeping" button, there will be 5 minutes of nap time before the next alarm, until the alarm itself turns off. Long press the alarm button to turn off the alarm. The SNOOZE button is designed as BIG for easy searching. Press the light button, you can adjust the brightness from low to high. You can use the dimmer slider to reduce the brightness to your own comfort level, which is very user-friendly at night and will not harm your eyes. To power the clock, just plug in the power cord. When you take it to outdoor travel or any outdoor scene, it can be powered by 4 AAA batteries (battery not provided, battery life is 2-3 days). The brightness of the 100%-0% display screen is fully adjustable and comfortable to watch. 12 or 24 hours switching, the channel volume is adjustable. The speaker sound is clear and the additional USB port allows you to charge your smartphone, for iPad or other smart devices. Item Name: LED Clock Material: ABS Power supply: USB 5V 2A Power Input, 4 X AAA Batteries (not included) Alarm Duration: 5 Minutes Snooze Time: 5 Minutes Size: 12.8cm x 6.6cm x 3.5cm/5.04" x 2.6" x 1.38" (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 LED Clock 1 x USB Cable 1 x User Manual