[he passes it over, because why not?? lúcio assumes a friendly old man isn't about to hustle him for his tech.]

It works by soundwaves so... yeah? I guess. Careful with the trigger, if you pull it wrong it'll release a sound blast that'll... uh. Ruin a bun of stuff in here.

[he shrugs helplessly.]

I wasn't gonna weaponise it, but kill the medic is a real thing. I gotta knock people back to get away sometimes!