Perimeter Technologies Add-on or Replacement Electric Dog Fence Containment Collar - Compatible with Invisible Fence R21 Series Fences (7k Frequency)

Perimeter Technologies Add-on or Replacement Electric Dog Fence Containment Collar - Compatible with Invisible Fence R21 Series Fences (7k Frequency)

INVISIBLE FENCE COMPATIBLE - This collar will work with Invisible Fence Brand Inground Fences prior to the 800 Series, Including ICT-700, ICT-725, ICT-750, ICT-775, ICT-150, ICT-250, ICT-100, ICT-75, ICT-50, AT-950 Indoor Transmitter, CT-4001 NOT COMPATIBLE - These collars will NOT work with Invisible Fence 800 Series Systems or later fence (including the Titanium Series). Will NOT work with Boundaries Plus Fence. Nor will it work with the Shields Indoor Avoidance Transmitters FREQUENCY SELECTION - Most Invisible Fence Brand Underground Fence Systems run on 7K, by default. Systems that were setup with neighboring fence systems in place may run on 10K, to avoid interference AMERICAN MANUFACTURED - This collar is proudly manufactured in the United States with imported parts WATERPROOF COLLAR RECEIVER - The craftsmanship that goes into every Perimeter brand dog fence is so good they offer the only battery replaceable waterproof collar receiver on the market. Perimeter brand receivers will continue to function without issue when completely submerged in water.

Perimeter Technologies is a brand you can trust with products that are loaded with exclusive features and benefits not found in the original. Perimeter Technologies' President is the same person who founded Invisible Fence brand back in 1976!

Compare Perimeter Technologies with your current R21:

PATENTED Comfort Contacts cushion your dogs 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

DESIGNED and MANUFACURED in the USA with imported parts. 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 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

Please indicate 7K or 10K frequency when ordering. 7K is the most common frequency, the 10K was used in installations experiencing frequency conflicts with neighboring containment systems.