500 yard range e-collar (SD-425X) with additional Add-A-Dog collar (SDF-AXF) to train 2 dogs with 1 remote Detailed operating guide explains how to
SportDog FieldTrainer 425XS Remote Trainer - Waterproof Rechargeable Dog Training E-Collar with Shock, Vibrate & Tone, 500 Yard Range Dog Shock Collar, Includes eOutletDeals Pet Travel Bowl
Dog Training Collars - E-Collar - SportDOG
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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 Static : : Pet Supplies
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SportDOG Brand® FieldTrainer® 425XS Remote Trainer