Works like a mobile serial number. Dongles plug into USB ports on Macs and/or PCs and can be used at multiple workstations (one at a time)
Used for a single computer only. This is a good option for labs with a permanent workstation and users who don't want to worry about losing a dongle or who have one workstation they will be using for analysis.
Cost effective and a great option for institutions and labs with ten or more users. Set up an account, register users, use a single serial number.