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Amazon.com: SportDOG SD-425X Electric Training Dog Shock Collar with Remote for Small, Medium, and Large Dogs - 500 Yard Range, Vibration, Tone, Up to 21 Stimulation Levels, Waterproof, Rechargeable E-Collar : Pet
E-Collars- What do the buttons on the Remote Transmitter and Receiver Collar do?- SD-425, 425S, 825 - SportDOG® Netherlands (Holland)
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