Adjustable Volume& 7 Ultra-Clear LED Screen Special designed loud alarm clock for heavy sleepers adjustable 5 levels volume provide louder and stronger alarm volume, easy to wake you up. This time on ceiling clock has adjustable 5 levels dimmerdisplay allows you read the time clear than ever on our 7 ultra-clear LED screen. All setting buttons are easy to operate, even for kids or elders. Dual Alarms with Function The ceiling clock projector for bedroom has two separate alarms design which could wake you and your companion up at different alarm time setting, or double waking-up service for you only. Press the big SNOOZE button at thetop to get extra precious 9 minutes sleep till next loop of this alarm. USB Charging Port& Battery Backup Settings Plug in AC power to make this alarm clock projection on ceiling work and it has 1 USB charging port for your other electronic devices such as cellphone and tablet etc., no need to charging your device byusing an extra plug. Install 2 AAA batteries(not included) to get the backup of your personal settings and let your alarm works even during the power outage, so everything will be organized as usual.