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SportDOG SDR-AH Add-A-Dog Collar Receiver is the original Collar Receiver for the HoundHunter 3225 system. Add another dog to your current SportDOG electronic collar system or replace a Collar Receiver with the SDR-AH Add-A-Dog Receiver. This Collar Receiver comes with a blue strap to easily identify Collar Receivers.
Avoid leaving the collar on for more than 12 hours a day. Please refer to packaged instructions for additional details.