DT Systems Bark Collars come with innovation design and technology. A vibration Sensor will eliminate extraneous noises such as dog's tags. scratching or other dogs barking and will only pick up vocal cord vibrations. DT Systems Bark Collars offers lightweight collar recievers which include an internal antenna systems. A revolutionary idea and great example of DT Systems to developing products with cutting edge innovation. DT Systems Bark Collars are waterproof and have small and lightweight reciever collars. They are designed not to be intrusive and bulky. We are authorized dealers of DT Systems Bark Collars and we are confident you will be satisfied with any DT Systems product.