Replacement transmitter for the FieldTrainer 425 and 425S. The SD-425 system is fully customizable, allowing you the flexibility to set 2 or more transmitters to control the same collar receiver.
Features:
- Modes of operation: 7
- Expandable up to 3 dogs
- Range up to 500 yards
- Tone and Vibration options
- DRYTEK waterproof and submersible to 25 feet
