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