Perimeter R21/R51 7K Invisible Fence Compatible Dog Collar Receiver ICT-700/725





Quick Overview

Perimeter Technologies, a leading manufacturer of electronic pet fencing, has designed a cost effective alternative to the once exclusive Invisible Fence R21 Fence dog fence collar, providing owners of the nation’s largest and best known professionally installed dog fence brand a significant savings on their replacement collar receivers.


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:
  • PATENTED Comfort Contacts cushion your dog’s neck in soft rubber
  • PATENTED 3-Way, Omni-Directional antenna design eliminates the “holes” found in lesser pet fencing systems
  • WATERPROOF and submersible collar receiver design
  • PROGRESSIVE STIMULATION allows your dog to choose the fence level that is right for their personality
  • ULTRA-SMALL and light weight collar design is a mere 1.1 oz!
  • LONG LASTING replaceable lithium ion batteries
  • Limited Lifetime warranty
  • You save!
  • 100% compatibility – guaranteed!

    This replacement collar receiver for 700 Series Invisible Fence systems only and will not work with 800 series or later, including 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

PTPIR-003 Includes:

  • 1 Dog Collar Receiver
  • 1 Pair of Rubber Comfort Contacts
  • 1 Pair of Medium Steel Contacts
  • 1 Lithium Ion Battery Pack
  • 1 User's Guide

Do I need a 7K or 10K Collar? 
To determine what version you need, simply lift the lid and look for the SW1 switch. The position of that switch will determine the frequency the system is transmitting (view the image bellow). If you have an older unit, you would have a white sticker on the right hand side displaying the frequency.


We Are Authorized

Freedom Dog Fence is an authorized Perimeter Technologies online retailer and we ensure that your warranty is 100% valid.

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