The Smart Troll II Transducer attaches to the transom similar to a Fish Finder Transducer. The only difference is that it points back (towards your lures) instead of down towards the bottom.

All of the components of Smart Troll II can easily be moved to another boat so the only thing you need to use Smart Troll II on two different boats is a second Smart Troll II Transducer (one for each boat.