Previous work has shown that uninstrumented in-air interaction is slower and not as precise for pointing tasks compared to the mouse. Yet, there are interaction scenarios where it is preferable or advantageous to use in-air input. Therefore, we examine a three-device hybrid setup involving the mouse, keyboard, and a Leap Motion. We performed a user study to quantify the costs associated with transitioning between these interaction devices and also for performing simple 2D manipulation tasks using the mouse and Leap Motion. We discovered that transitioning to and from the Leap Motion takes on average 0.87 seconds longer than transitions between the mouse and keyboard.