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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 825X Remote Trainer - Rechargeable Dog Training Collar with Shock, Vibrate, and Tone - 1/2 Mile Range - SD-825X : Everything Else
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