The Element 302M dog training collar by Dogtra is the 2-dog system of the new Element series.  This series has all the basics you need for the everyday training and behavior issues a dog owner needs.

The system comes with one transmitter and two collars.  As seen in the photo there is a small switch toward the top of the transmitter in which you will flip to distinguish which collar is receiving the stimulation from the press of a button.  Also on the sides are the vibration paging buttons as well.  All the same features as the 300M including fully waterproof and 1/2 mile range.

This will come with one orange collar strap and one black collar strap.

Download the Dogtra 302M owner's manual