General description The Black Ceiling Projection Alarm Clock features a 180° adjustable projection angle, allowing the super bright red light to project the time onto the wall or ceiling from a distance of 2-3 meters. This multi-functional clock not only displays the time but also shows indoor temperature, date, week, and month, making it a versatile addition to your bedside table. Technical specifications Projection angle: 180° Projection distance: 2-3 meters Power supply: 2 AAA batteries (not included) or DC 4.5V input (USB cable included, main adapter not included) Usage Supports 12/24 hour format Features a color LED backlight screen for easy visibility at night Includes an alarm function with a repeating pattern Energy-saving mode when powered by batteries, with backlight and projection lasting 8 seconds when activated Continuous backlight and projection when powered by an external source