Romana's sonic screwdriver

Romana II constructed her own sonic screwdriver while travelling with the Fourth Doctor. Her design was impressive enough that the Doctor attempted to swap with her, although she refused. She used it when helping repair a Skonnan battle cruiser, but accidentally left it on the bridge and was unable to escape. (TV: The Horns of Nimon)

Sleeker than the Doctor's, Romana's screwdriver had similar functions. One feature it included was a silencer. (AUDIO: Luna Romana) Unlike the Doctor's model, however, this screwdriver did not have an emitter ring. (TV: The Horns of Nimon)

When asked by the Fourth Doctor if she had brought her sonic screwdriver with her, Romana responded that she had left it on charge inside the TARDIS (AUDIO: Babblespheare)

Romana's sonic screwdriver was destroyed during her travels with the Doctor in E-space, however she later resolved to build a new one. (AUDIO: The Planet of Witches)

Romana III's model could override a Type 160's entry protocols. (AUDIO: Intervention Earth)