Add another dog to your current SportDOG Brand® electronic training collar system or replace a Collar Receiver with the SDR-AXF Add-A-Dog® Receiver Collar. Comes with a convenient docking station that charges the collar in 2 hours.
Waterproof - DryTek® waterproof and submersible to 25 feet.
Dog Size: - For dogs 8 pounds or larger with neck sizes 5" - 22".
Batteries: - Rechargeable lithium-ion batteries. Charges in 2 hours, lasts 40-60 hours per charge.
Low Battery Indicator: - Yes.