NOTE: Only uses battery and will not display time. Power must be supplied via the USB socket. Large Mirror Display: The bedroom clock is equipped with a 6.5-inch large and clear LED display, which is easy to read even for the elderly and near-sighted. Borderless aesthetic design, perfect for desktop decoration. 3 Levels of Brightness: The desk clock has 3 levels of brightness: low, medium and high. Brightness can be adjusted manually or automatically. Automatic setting When the screen brightness changes automatically with the external light, it will not darken at night and affect sleep and protect your eyes. Dual USB Charger: The digital clock is powered by DC-5V/1A USB, with 2 USB ports, it can charge mobile phones, earphones and gadgets. This clock has a lithium battery, in case of power outage, it can remember the time and alarm, you don't need to reset the time and alarm. Snooze Mode: The big snooze button on the top is easy to touch even if you don't open your eyes in the morning. You can set different nap intervals (5 ~ 60 minutes), perfect for heavy sleepers. Detachable Base Wall Hanging Hole: When you use the stand, it will become a desk clock without taking up much space. There is a wall hole on the back where you can hang it and use it as a special wall clock.