The Collar Receiver for FieldTrainer 425X and SportHunter 825X. Add another dog to your current SportDOG Brand electronic training collar system or replace a Collar Receiver with the SDR-AXF Add-A-Dog Receiver Collar. Comes with a convenient docking station that charges the collar in 2 hours.
- Dog Size: 8 pounds or larger
- Fits neck size 5″ – 22″
- Battery Type: Rechargeable Li-Ion