The Resonance Blaster from TF Prime which found & used by Soundwave in episode 'Triage'..... Also in episode 'Hard Knocks' in case you wanna know.
Simply clip on the wing of Soundwave. Or switch the 5mm peg come along for other cons or bots with free wills.
1.958 w x
1.202 d x
0.771 w x
0.473 d x