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
DESIGNED and MANUFACURED in the USA
Limited Lifetime warranty
100% compatibility – guaranteed