Have the protection of a guard dog without the expense and maintenance of the real thing! When someone approaches, alarm triggers sound of a barking German Shepherd in attack mode, helping to scare off would-be intruders. Also features alarm and chime modes with 8 volume settings up to 120 dB. Senses motion through most walls and remote control works up to 50 feet. 6″ x 5 3/4″ x 3 3/4″. Includes AC adapter or Req. 3 “AA” batteries, (sold separately).