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.Features:
- Dog Size: 8 pounds or larger
- Fits neck size 5" - 22"
- Battery Type: Rechargeable Li-Ion
- Battery Life: 40-60 hours of "on-time" per charge
- Battery Charge Time: 2-hour quick charge