Streetwise Security Products Streetwise Electronic Watch Dog Motion activated home security alarm emits a loud and authentic barking dog sound to scare off would-be thieves or attackers 24-7 Uses radar waves to detect movement through walls from up to 20 feet away and has a sensitivity adjustment dial to fit your needs Includes a wireless remote controller that can arm or disarm your "guard dog" or set off a panic alarm in an emergency from a distance Also has a volume control dial and can be set to a pleasant visitor chime setting for use when you are at home and expecting guests Comes with an AC adapter for constant power from any standard outlets and can also use 8 AA batteries (not included) as backup in case of a power outage