Perimeter R21 10K Replacement Collar – Invisible Fence Compatible

Perimeter R21 10K Replacement Collar – Invisible Fence Compatible

The Perimeter R21 10K Replacement Collar is designed for homes that experience frequency interference from nearby pet containment systems. The 10K model offers stable operation in challenging signal environments while remaining fully compatible with 700-series Invisible Fence® systems.

This collar serves as a reliable replacement option for owners needing a cost-effective, high-quality receiver that matches the performance of an R21 while adding several important enhancements.

Key Features

• 10K frequency design for improved performance where signal conflicts occur
• Comfort Contact™ soft rubber probes for a gentler, skin-friendly connection
• Three-way omni-directional antenna for consistent boundary detection
• Waterproof and submersible receiver built for outdoor use and active dogs
• Progressive stimulation response that adjusts automatically to your dog’s movement and behavior
• Lightweight build (1.1 oz) for comfortable everyday wear
• Replaceable long-life lithium-ion batteries
• Limited lifetime warranty
• Designed and manufactured in the USA

System Compatibility

This receiver is compatible with 700-series Invisible Fence® transmitters, including:

ICT-700, ICT-725, ICT-750, ICT-775, ICT-150, ICT-250, ICT-100, ICT-75, ICT-50, AT-950 Indoor Transmitter, CT-4000

Not compatible with:
 – 800-series and later Invisible Fence® systems
 – Titanium Series
 – Shields™ Indoor Avoidance transmitters

Why Choose This Collar

The Perimeter R21 10K Replacement Collar provides stable signal performance, comfortable contact points, and a lightweight, waterproof design—making it a dependable alternative for maintaining your pet’s safety within an Invisible Fence® boundary.