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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 Static : Pet Supplies
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Amazon.com: SportDOG Brand SportHunter Family Remote Trainers - Including New X-Series - Waterproof, Rechargeable Dog Training Collars with Static, Vibrate, and Tone - Up to 1 Mile Range : Pet Supplies
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