Discover key details about this versatile 3-in-1 device combining a phone charger, alarm clock, and temperature reader: Operating via USB, this alarm clock lacks a built-in battery but relies on a memory button battery for uninterrupted timing. Ensure your phone supports wireless charging for compatibility. Troubleshoot display issues by turning off the power-saving mode. To cancel a set alarm, navigate through the corresponding mode and use the "down" key. Adjust the display to show only the time by cycling through "dP_1," "dP_2," and "dP_3" using the "UP" button. The package includes the alarm clock, a USB cable (plug not included), and an instruction manual.