How to Match Replacement SportDOG Add-A-Dog Collars to Your SD-425X / SD-825X / SD-1225X System

1. Turn the Collar Receiver off.

2. Press and hold the On/Off Button. The Receiver Indicator Light will come on, then turn off in 4-5 seconds. If the On/Off Button is released too early, the Receiver Indicator Light will begin its normal flashing. If this occurs, start over and repeat from step 1.

3. After the Receiver Indicator Light has turned off, release the On/Off Button.

4. Press and hold the Upper Button on the Remote Transmitter until the Receiver Indicator Light flashes 5 times. You may need to hold both units 2-3 feet from each other. If the Receiver Indicator Light does not flash 5 times, start over and repeat from step 1.
How to Program the Collar for Multi-Dog Operation with the SD-425X/SD-425XS/SD-825X/SD-1225X 1. Program the Remote Transmitter to mode 3 or 4. (Consult the X-Series Owners Manual for more information on Transmitter Modes.)