24-hour set-&-forget alarm with auto-repeat & auto-shutoff; 1-touch alarm reset button; Electronic buzzer alarm with normal or extra-loud settings; Snooze/repeat alarm; Low battery warning indicator; Operates on 120V AC house current; ETL listed; Requires 2 AAA batteries for battery backup; Dim: 2.4H x 5.5W x 2.3D; Black;