The original Collar Receiver for FieldTrainer 425 and SportHunter 825. Add another dog to your current SportDOG Brand electronic training collar system or replace a Collar Receiver with the SDR-AF Add-A-Dog Receiver Collar. Comes with a convenient docking station that charges the collar in 2 hours.

Features:

• Dog Size: 8 pounds or larger
• Fits neck size 5″ – 22″
• Battery Type: Rechargeable Li-Ion