The SportDOG SDR-A is the Add-A-Dog collar for the SportDOG SD-1825, and SportDOG SD-1225. Also compatible with the SD-2525 and SD-3225. This collar has the built in performance that is required for controlling a second hunting dog. This receiver has a one mile range and is ergonomic and slim to ensure a proper fit. Like all the SportDOG Add-A-Dog Collars, the SDR-A can be added to your current unit with a press of a button, and it only take about 5 minutes to make your single dog unit to a multi-dog unit.
The SDR-A is 100% waterproof and is able to be submersed in up to 25 feet of water. It uses rechargeable, replaceable lithium-ion battery, they are able to be fully charged in just two hours, and have a life of 40-60 hours of running time. The collar has an on/off switch and a low battery light.