Power Guide This product can be powered via USB connectivity. The package does not include a power adapter; you must supply your own USB adapter. The 2xAAA batteries are solely for backup/memory retention purposes and are not intended for primary power supply. 1 Wide Viewing Angle Clear Display:? Easily readable from a distance and wide angles, especially ideal for seniors; doubles as elegant décor. ?2 Adjustable Mood Lighting:? Creates a warm ambiance at night and enhances any space with simple, elegant décor. ?3 5-Level Manual Brightness Control:? Tailor screen illumination to any environment. ?4 Extra-Loud Dual-Alarm System:? Specifically designed for deep sleepers and adults, ensuring reliable wake-up. ?5 Day Date Display:? Shows both the current day of the week and the date.