Stubborn dog, you've met your match! He may be stubborn, but don't let that stop you from keeping him safe and out of harm's way. This wire fencing system and receiver collar are designed to help manage dogs with strong temperaments or highly influenced by their natural instincts. A radio signal is sent through a buried wire, delimiting the perimeter authorized for the animal. The receiver collar, with 5 stimulation levels, detects the signal when the dog crosses the perimeter boundary, and delivers a safe but surprising stimulation to the animal. This system is effective for dogs of all sizes and over 3.6 kg. System includes: Transmitter with adapter, Waterproof receiver with adjustable collar for neck sizes tours from 15 cm to 71cm, User and training manual, 150 m of wire and 50 pennants, Multifunction key, 9 Volt battery.