Spot On Virtual Smart Fence VSF-001-1 Generation 1. Tested. Collar is adjustable from about 19"-24". Includes GPS Collar, USB Charging Cable, USB Adapter, 31 Training Flags, Instructions, Probe Wrench/Tester, 2 Sets Of Probes, And Box. I used this a couple of times and packed away for 4 years. Charged it up and it works fine. Paid over $2000 for it new. This is generation 1. Spoton has obsoleted this collar and no longer supports 3G phone connections. The collar will no longer do the optional live tracking. GPS Containment works fine. Also the current APP does not work with this collar. You can still create maps by walking the perimeter of the containment area. Up to 10 maps can be created. Also there are numerous built in circular maps available at different sizes. I will ship the collar with the static correction turned off. If you want to use the static correction you will need a bluetooth le client with read/write capability. it can be installed on an iPhone, or PC. You will need to change the characteristic that starts with 741F0006 to a numerical value between 0-30. You will want to pair with SO-Luna or SO-SPOTON. The collar does have audible alert tone at 10 feet from boundary and a warning tone at 5 feet from boundary. Static correction if turned on will occur at the boundary.