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Amazon.com: PetSafe Add-A-Dog Remote Training Collar – Perfect for Small, Medium and Large Dogs – Choose from Tone, Vibration, or 15 Levels of Static Stimulation – Waterproof and Durable – Rechargeable : Pet Supplies
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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
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