USB Powered: *Not battery operated. This non-ticking alarm clock is powered by a USB power cable (main power operated, adapter not included). This eco-friendly wooden LED alarm clock is a great gift for yourself, your family, and the environment. Multifunction: Flysocks alarm clock displays time, temperature, and humidity with both 12/24H and / formats. Three alarm settings, 3-level automatic adjustable brightness and speaker, USB power supply, no ticking, and sound control. Only 3 buttons, easy to set up and use. Portable size, used in bedrooms and offices. User-friendly manual. Large dimmer display; Sound control: The bedside clock automatically adjusts brightness from 07:00 to 18:00 (bright), 18:00 to 23:00 (moderate), and 23:00 to 07:00 (dim). With energy-saving mode, the display turns off after 30 seconds, any sound over 60 dB nearby wakes up the alarm clock. You can turn off this function, which keeps the screen always on. Easy to use: The bedside clock has only 3 buttons. The easiest alarm clock to set up ever, meets your basic needs. Easy to use for children, seniors, and the elderly. You can set 3 wake-up alarms. Updated version with LOUDER SPEAKER is perfect for heavy sleepers. Modern design; Perfect gift: Stylish and compact casing brings the breath of nature into your room, to achieve the perfect combination with simplicity. Perfect for travel, desk, bedside table, office. Best gift for children, teenagers, and heavy sleepers.