Innotek Rechargable In-Ground Pet Fencing System is a micro-size collar is smaller, sleeker and waterproof. Innotek's exclusive 24/7 battery back-up system keeps your dog safely in the yard, even if the power goes out. Audible wire break alarm alerts you to trouble with the fence and gives you additional peace of mind. Rechargeable micro-size collar. 500' feet 20 gauge wire included. Transmitter range up to 25 acres. 24/7 Built-in battery backup. Audible wire-break alarm. International Customers. Please Note: These products are for the U.S. and Canada markets, and not for oversear export. Because European products must be manufactured to comply with EU standards, they carry different model numbers and prices. For ordering assistance please go to our International Dealers Section.