Our products are reliable, effective, and comfortable for large or small dogs. The system assists in controlling your dog without a leash in a range up to 500M away! Instantly send a signal from the Remote Transmitter, which activates your dog’s Collar Receiver. The dog will receive an annoying but safe, harmless stimulation. With correct, consistent use of this product, the dog will associate his misbehavior with your corrections, and soon enough, you will have a well-trained dog. This particular model features adjustable levels of stimulation, enabling the user to tweak accordingly to the dog’s temperament, removing the risk of over stimulation.