Judingcheng J601 Ultrasonic Bark Stop Collar electric dog fence Formulated for moderately active to Formulated for moderately active to active dogs Introducing the most exciting advancement in the history of speaker selector products: The ATON™ DLA 2 Room Remote Controllable Speaker Selector(DLA2) with RF and IR control options Water proof dogs can swim while having the collar on Adjustable stretch Activated only when your dog is barking does not get activated by other dogs Stops barking by audible sound or ultrasonic noises (selectable) so dog is never actually hurt Two levels of sound output selection Powered by L1180 button batteries (included)