JUSTPET Pet Wireless Dog Fence Boundary Container System, M-3 Waterproof Rechargeable Collar Receiver

THIS COLLAR RECEIVER IS COMPATIBLE ONLY WITH OUR M-3 WIRELESS DOG FENCE Let your dogs wear this collar receiver then dogs can be added indefinitely to our product of wireless dog fence system Anti-Over Shocking Design - During correction, the collar will first issue a strong vibrate as a warning and then shock for a few seconds, then beep and shock again Rechargeable and Water Resistant, Rain Proof Package Included collar receiver,high flex collar strap and test light