A handset for inspecting a target object with a sensor in an inspection module is disclosed. The handset includes a housing having a grip portion adapted to be held by a person, the housing adapted to selectively mechanically engage with the inspection module, a handset interface on the housing adapted to exchange signals with the inspection module, a handset processor, a user input interface accessible to the person gripping the grip portion and adapted to provide a control signal to the handset processor, and a user output interface responsive to the handset processor to display the data transmitted by the handset processor about the target object.