Powerful alarm sound Classic double bell design with a mechanical ringing sound exceeding 70 decibels, effectively waking even the heaviest sleepers. Modern LED display Contemporary LED dial clearly displays the time, blending retro aesthetics with modern functionality for easy readability in any lighting. Silent operation This digital alarm clock operates without the constant ticking sound, creating a peaceful environment conducive to relaxation and sleep. Power options Designed for convenience, it can be powered by a USB charging cable or three AAA batteries (NOT INCLUDED), providing flexibility for use at home or in the office. Use scenarios Bedside alarm in the bedroom: place on a nightstand to reliably wake up at your set time without moving to a different room. Desk or dorm room setup: USB power for continuous use at a workstation or study area. Portable or backup power: three AAA batteries provide operation during outages or in spaces without readily available outlets.