RoadPro RP-47543 12-Volt or Battery Operated Super Loud Alarm Clock ROADPRO 12-Volt or Battery Super Loud Alarm Clock RP-47543 Features high/low settings with snooze setting for extra sleep Clock operates on 2 AAA batteries Alarm powered by 9V battery or plugs into cigarette lighter 12-volt power source Includes self-adhesive hook and loop tape for easy mounting