Desktop Port Replicator Supporting USB 2.0.  Works with the Toughbook 29, Toughbook 30 MK4 and Toughbook 31 i3 Only

It allows you to have a home base for your laptop on your desk.

AC Adapter is not included and must be purchased seperately if you need it. To purchase an Ac Adapter for this unit, simply purchase an extra ac adapter for your toughbook