SportDog, Add-A-Dog SDR-AH (SD-3225), HoundHunter by SportDog Brand
Amazon.com: SportDOG Brand FieldTrainer 425X/SportHunter 825 Add-A-Dog Collar - Additional, Replacement, or Extra Collar for Your Remote Trainer - Waterproof and Rechargeable with Tone, Vibration, and Shock : Pet Supplies
Murdoch's – SportDOG Brand - Add-A-Dog Receiver
SportDOG SDR-AF Add-A-Dog Receiver Collar SDT00-13858 for SD-425-425X-825-825X | eBay
Sdr-ah HoundHunter® 3225 Add-a-dog® Collar - Store | SportDOG
SportDOG SD 425XS Add-A-Dog Additional Collar / Extra Receiver SDR-AXS
Amazon.com: SportDOG Brand FieldTrainer 425X/SportHunter 825 Add-A-Dog Collar - Additional, Replacement, or Extra Collar for Your Remote Trainer - Waterproof and Rechargeable with Tone, Vibration, and Shock : Pet Supplies
SportDOG SDR-AF Add-a-Dog Replacement Receiver Collar SDT00-13858 for – ineedths
Sdr-ab UplandHunter® 1875 Add-a-dog® Collar - Store | SportDOG
SportDOG SDR-AXF Training Collar ADD-A-DOG for SD-425X,XS,825X,1225X,1825X,2525 971516069129 | eBay
SportDOG SDR-AF Add-a-Dog Replacement Receiver Collar SDT00-13858 for – ineedths
Amazon.com: SportDOG Brand WetlandHunter 1825X Add-A-Dog Collar - Additional, Replacement, or Extra Collar for Your Remote Trainer - Waterproof and Rechargeable with Tone, Vibration, and Static : Pet Supplies
Amazon.com: SportDOG Brand SportHunter 1225X/1825X Add-A-Dog Collar - Additional, Replacement, or Extra Collar for Your Remote Trainer - Waterproof and Rechargeable with Tone, Vibration, and Shock : Pet Supplies