Perimeter Technologies Invisible Fence R21 Replacement Collar - 7K

Replace your Invisible Fence R21 collar with the Perimeter Technologies 7K Replacement Collar. This compatible receiver collar delivers reliable performance with Invisible Fence R21 systems, providing a cost-effective alternative to OEM replacement collars.

R21 System Compatible

• Compatible with Invisible Fence R21 systems (7K frequency)
• Waterproof construction for all-weather reliability
• Adjustable correction levels for customized training
• Cost-effective alternative to OEM collars

Reliable Replacement

This replacement collar delivers the same reliable boundary control as your original collar at a fraction of the cost. Restore full fence functionality without the premium price of OEM replacement parts.

All-Weather Performance

Fully waterproof design ensures consistent operation in rain, snow, or during water play. Your dog can enjoy outdoor activities without system interruption, providing dependable boundary protection year-round.

Easy Replacement

Simply replace your existing collar with this compatible receiver and your fence system is back to full operation. No programming or system changes required—just install and go.