This is a pre-owned Invisible Fence R21 Platinum Receiver Collar for use with 700 Series in-ground dog fence systems.
Receiver may show cosmetic wear, but has been carefully inspected, cleaned, and fully tested.
What’s Included
R21 Platinum receiver
New aftermarket replacement collar strap (not OEM)
Choice of strap color and contact point length
Contact Point Length: Standard points fit most dogs. Long points are recommended for thick or long fur. Collar Strap: Fully adjustable — fits neck sizes up to 28 inches.
Compatibility depends on your transmitter settings – not just the collar model. Please remove the cover from your wall-mounted transmitter and check whether it is set to 7K or 10K.
Use the Compatibility Tool Below before ordering to make sure you have the correct system and settings.
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60-Day Money-Back Guarantee
Buy with confidence — returns accepted within 60 days
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Ships Next Business Day
In stock and ready to ship from the U.S.
Will this collar work with your Invisible Fence system?
Use our free tool to confirm compatibility before you order.
Amanda K. –
Good buy!
Daniel R. –
The collars looked brand new and everything worked with my system.
N.O. –
Item was as illustrated in the photos. I completed testing the unit and it works perfectly. Very positive experience.
Brian E. –
Exactly what I ordered!
Diego Y. –
Quality product and exactly what I expected.
Nicole –
Item was in good working condition, reasonably priced, and saved me over $250.
Priya –
This is the second collar I’ve bought and it works great.
Grace L. –
Good price
Mia Q. –
Thank you! It works and is exactly as described.
Mia X. –
Collar works and is in decent condition as described.
Daniel A. –
The unit was in great shape and looked barely used.