description Material: ABS color: White Adjustable Stretch Collar Lightweight Construction Ultrasonic and Audible Selections On / Off Button Triggers accurately activited by Bark Vibration ( can not be activated by other dogs barking) LED indicator NOTE: Not guaranteed to work on all dogs, depends on every dog's sensibility to ultrasonic sound. Works better for small, medium dogs Packing content: 1 x Bark Stop Control collar 1 x Adjustable strap 2 x L1130 button batteries 1.Wonderful device for your Dog Training! The Ultrasonic Bark Stop Dog Training 2.Collar is an advanced behaviour modification device designed to help train your dog to stop excessive barking. This Dog Collar eliminates interruption from another dog. You can truly enjoy the outdoors with your pet, and eliminate nuisance barking. 3.The Bark Stop Collar is an advanced sentence modifier modified to specifically train your dog to stop excessive barking. 4.The Dog Training Collar is activated through the bark vibration of the dog wearing collar. This Dog Bark Collar eliminates interruption from another dog. 5.You can now truly enjoy the outdoors with your pet, and eliminate nuisance barking. The Dog Collar straps are elasticated with an buckle.