Yes, you can use multiple Halo Beacons with the Halo Collar.

Things to keep in mind:

1. If you use two beacons, there is a chance there could be interference if they are too close and the ranges are set too high on both beacons. 
2. By going to Settings > My Beacons > Select Beacon and lowering the ranges accordingly, or relocating the beacons to be further apart from each other, you can reduce this potential conflict between the beacons.

The image above shows an example of two beacons interfering with each other. As we cannot see the blue circle around the beacon, that blue circle is the boundary that provides feedback using the beacon or protects the collar from feedback in ignore fences mode.

To purchase additional Beacons, please click here.