The easy-to-install, performing in-ground fence™ Deluxe little dog is intended to keep smaller dogs safe in a predetermined area. The narrow professional head holder is an adjustable strap for a neck circumference of 15-66 cm. * Suitable for dogs with a weight of more than 3.6 kg. * Includes 1 receiver collar for small dogs. * You can extend 10 hectares (additional cable and flags required) * Adjustable neck strap with the QuickFit buckle * Waterproof * 4 training modes * with only sound option * Works with multiple pets (additional collars by PetSafe are sold separately)