The original Collar Receiver for FieldTrainer 425S. Add another dog to your current SportDOG Brand electronic training collar system or replace a Collar Receiver with the SDR-AS Add-A-Dog Receiver Collar.

Compatible with:

FieldTrainer 425 (SD-425), 425S (SD-425S)

SportHunter 825 (SD-825), 1225 (SD-1225), 1825 (SD-1825)

WetlandHunter 425 (SD-425CAMO), 1825 (SD-1825CAMO)
ProHunter 2525 (SD-2525)
HoundHunter 3225 (SD-3225)
UplandHunter 1875 (SD-1875)