Radio Systems Corp Sportdog In-Ground Fence

Designed to keep dogs in yards up to 100 acres. Safe and effective for all dogs over 10 lbs. Expands to any number of dogs w/purchase of additional collar receivers. Waterproof collar receiver runs on 9V battery 6-12 months battery life. Built-in lightning protection. 1000' of wire and 100 flags included. Collar receiver sized for dogs over 10 lbs. Select from: 4 levels of adjustable correction and tone & vibration. Anti-linger feature prevents dog from hanging out in warning zone and running battery down. Wire break alarm on transmitter