The SD-825X model uses the smallest collar of the family while still providing up to ½ mile range for up to 3 dogs. Check it out at Okie Dog Supply.
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SportDOG SD-825X Rechargeable Dog Training Collar for sale online
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Collar Receiver only; expand your current system or replace an old collar Compatible with the SportDOG Brand FieldTrainer 425X (SD-425X), 425
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1 MILE RANGE: One mile range e-collar that can support training up to 6 dogs with the same remote with purchase of additional collars (SDR-AXW). For
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