1. This product is a combination device of audio and alarm clock. It makes enough noise to cover unnecessary noise interference. Provide you and your family with two adjustable volume alarms, 0 to 100 percent display dimmers, socket power supply and battery power supply for AC power interruption.2.12 soothing sound or noise machine: white, brown and pink noise, three kinds of fan sound, forest (birds), lullaby, summer night (crickets), rain, thunderstorm, sea wave. Listen to your favorite voice and fall asleep It will automatically shut down at your scheduled time (15 to 150 minutes or uninterrupted) .3. Dual alarm clock, with 6 natural alarm sounds (flute, bird, piano, buzzer, bell and beep), 25 alarm volume levels: the maximum volume is suitable for most sleepers You can turn off the alarm clock or take a nap for 9 minutes (up to 7 times).4. It is convenient to read from a distance through the 2.84-inch display screen. Thumbwheel dimmer allows fast brightness adjustment between 0 and 100 percent .5. The battery operation mode can maintain the volume for 3.5 hours at the maximum setting (excluding 3 AAA batteries). Keep the clock setting to ensure that you wake up in time when you need it, even if the power supply fails. In the socket power mode, the USB port on the back can be activated during sleep to charge the phone and iPad. 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.