Features:Small enclosure with high quality output.Up to 2 minutes of MP3 sound capacity.Two levels of sound volume.Equipped with a PIR motion sensors to trigger audio playback.Detection range up to 12 feet (4 meters.)Uses internal memory.Two modes: repeating (looping) mode and single message mode.Requires a micro SD cart to change sound files (user supplied). Very easy to operate!Ball joint style mounting hardware included to install in any orientation.Selectable power supply modes: an external power adapter or three AAA alkaline batteries (not included).Dimensions: 2.4" x 3.5 x 1.05" (60*90*26.60mm)