USB Powered: This alarm clock is powered by a USB cable (adapter not included). It is not battery operated. This eco-friendly LED wooden alarm clock makes a great gift for you, your family, and the environment.Multi-Function: The alarm clock displays time and temperature, with 12/24-hour format options. Features include three alarm settings, three levels of auto-adjustable brightness, a loud speaker, USB power supply, silent (non-ticking) operation, and sound-activated wake-up. Simple operation with only three buttons. Compact size ideal for bedroom or office use. Includes user-friendly manual.Large Dimmer Display & Sound Control: The clock automatically adjusts screen brightness: bright from 7:00 to 18:00, moderate from 18:00 to 23:00, and dim from 23:00 to 7:00. In power-saving mode, the display turns off after 30 seconds of inactivity and wakes up when it detects sound above 60dB. This function can be disabled to keep the screen always on.Easy to Use: With only three buttons, this bedside clock is simple to set and operate. Designed for ease of use by children, seniors, and elderly users. Supports three independent wake-up alarms. Updated version includes a louder speaker, ideal for heavy sleepers.Modern Design & Ideal Gift: Sleek and compact design adds a natural touch to any room. Suitable for travel, desktop, bedside, or office use. A perfect gift for kids, teens, and adults who need a reliable alarm clock.