Add another dog to your current SportDOG Brand In-Ground Fence system (SDF-100A) or replace a Collar Receiver with the SDF-R Add-A-Dog Collar Receiver. The In-Ground Fence system is expandable to any number of dogs.
Collar Receiver only; Compatible with SportDOG Brand In-Ground Fence System (SDF-100A)
4 levels of static stimulation, as well as vibration/tone
Replaceable 9-volt battery lasts 6-12 months; Anti-Linger feature prevents dog from running battery down
For dogs 10 pounds or larger