Extra Receiver Module for Sound Barrier and Wireless Sonic Fence. Want to restrict several different areas at once. Keep Fido out of the trash, off the couch and away from kitty's food all at the same time. Place a RSB-1 extra receiver in each restricted area. Add extra receivers to protect an unlimited number of area and extra collars to control an unlimited number of pets. Receivers may also be triggered by the Humane Contain model RX-10 electronic fence collar (sold separately) Requires a standard 9 volt alkaline battery (not included).
