The RoamEO Pet Monitor System allows you to locate your pet using a patened combination of satellite and radio signals. The easy to use system consists of an adjustable collar for your pet and a handheld receiver that monitors your pet's movements and will guide you to your pet if desired. RoamEO works right from the box and doesn't require a subscription or additional fees or services. Batteries and battery charger included. No Subscription No Additional Fees 500 Acre Range