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The Collar Receiver for FieldTrainer 425X and SportHunter 825X Remote Trainers. Add another dog to your current SportDOG Brand electronic training collar system or replace a Collar Receiver with the SDR-AFX Add-A-Dog Receiver Collar.


  • Collar Receiver only, expand your current system or replace an old collar
  • Compatible with the SportDOG Brand FieldTrainer 425X (SD-425X), 425 (SD-425), SportTrainer 575 (SD-575E), 875 (SD-875E), and SportHunter 825X (SD-825X), 825 (SD-825)
  • Waterproof and submersible to 25 feet using DryTek technology
  • Fits dogs 8 pounds or larger with neck sizes 5″-22″
  • Rechargeable lithium-ion battery with 2-hour quick charge; features a low battery indicator to let you know when to charge


  • Brand: SportDOG Brand
  • Style: New X-Series
  • Package Dimensions: 6 x 3 x 6.5 inches
  • Batteries: 1Lithium Polymer batteries required. (included)
Weight 1 lbs