All you need for your spectators to use the Mobile Scoreboard is an open WiFi signal. Make sure the SST computer is on the same network.
If you don’t have an open WiFi in the facility then you can obtain a wireless router and plug it into the SST computer.
Next, go into SST and under the “Help” menu select “QR Codes”. SST will create a QR code that you can print and post around the pool. When your spectators come into the facility they just connect to the network and scan the QR code.