The receiver is a small box attached to a collar. It has 2 probes that rest against the dog’s skin. The collar will react when it enters the radio signal. In the warning zone, it will give off an audible tone. DogWatch offers ‘Anti Linger’; the receiver will give a static stimulation if it remains in the warning zone for 20 seconds. When the receiver enters the correction zone it will give the dog a static stimulation. DogWatch offers a receiver with programmable levels to suit the needs of your dog’s training requirements. See ‘How does it feel’?