SportDog, Add-A-Dog SDR-AS (SD-425S), A-Series Field Trainer by

Expand your SportDOG electronic training system with the SDR-AS Add-A-Dog Receiver Collar for stubborn dogs. Perfect for FieldTrainer 425 sports.

SportDOG Extra Collar for SD-425X SD-425 SD-825X SD-575E Remote

SportDOG Brand SportHunter 1825X Remote Trainer - Rechargeable Dog

SportDOG Brand® SD-425XS X-Series FIELDTRAINER® ADD-A-DOG® COLLAR - FO

SportTrainer® Add-A-Dog Collar receiver – SportDOG® Spain

SportDOG Brand FieldTrainer 425XS Shock Collar for

SportDOG Brand 425 Remote Trainers - 500 Yard Range E-Collar with

SportDOG SD-425XS Field Trainer Stubborn 2 Dog Training Collar SDR

SPORTDOG Sporthunter SD-425 Waterproof Add-A-Dog Shock Collar

SportDOG FieldTrainer 425X/SportHunter 825X Add-A-Dog Collar - SDR

SportDOG SD-425X FieldTrainer 2-Dog Remote Field Training Collar