Don’t be fooled by the low aftermarket price. Perimeter Technologies®️ is a brand you can trust with products that are loaded with exclusive features and benefits not found in the original. As a matter of fact, Perimeter Technologies' President is the same person that founded Invisible Fence brand back in 1976!
Compare Perimeter Technologies®️ with your current R21:
This replacement collar receiver is for 700 Series Invisible Fence®️ systems only and will not work with 800 series or later, including new Titanium Series. The Perimeter®️ collar is not compatible with Shields Indoor Avoidance transmitters.
FULLY COMPATIBLE WITH THE FOLLOWING INVISIBLE FENCE®️ BRAND TRANSMITTERS:
ICT-700, ICT-725, ICT-750, ICT-775, ICT-150, ICT-250, ICT-100, ICT-75, ICT-50, AT-950 Indoor transmitter, CT-4000