2 alarms with snooze function: The alarm clock has two separate alarm times. You can set 2 alarms in one day to schedule your time accordingly. The snooze function allows for an extra 5 minutes of sleep. Simply press the snooze / light button located on the top of the alarm clock. The alarm will sound until you press another button. USB charging and built-in backup battery. Our digital alarm clock contains a USB charging cable for power supply (no adapter) and a built-in button battery to save your clock settings in the event of a power failure. (Note: Please connect the USB port or only 5V / 1A and 5V / 2A adapter to charge the clock). Temperature display and adjustable brightness: The travel alarm clock features temperature display ( C / F). You can switch the display of the temperature between C and F using the UP button. During charging, the LED screen lights up, and there are 3 brightness levels which are automatically adjusted to suit the time of day. LED digital display, clear and comfortable visual feeling, automatically dimmed between 22:00 and 6:00. You can also set the brightness manually in 4 levels. Voice control: the LED alarm clock screen lights up when it detects the sound or when you touch the "Snooze/Light" button. Clap your hands, tap on the table, tap or make a sound over 90 dB to activate the smart alarm clock. The display turns off automatically after 6s. Please note when you connect the clock to the power supply, the sound control function is turned off and the display is always switched on. 13 optional alarm tones and adjustable volume. This is a non-ticking alarm clock, and you can adjust the volume of the 13 alarm tones by pressing "and" or "-". It is simple to change the volume or the alarm. The time display supports both 12 hours and 24 hours format.