The Sepura SC20 is a professional handheld TETRA radio made for police, fire, ambulance and other public safety teams, so its receiving tone is associated with real dispatch work rather than a film or game effect. Short clips of that tone circulate on soundboards because creators want a clean, recognisable radio cue for edits, streams and roleplay videos without using actual emergency transmissions. Its brevity and official feel keep it useful for signalling that a message is arriving, especially in scenes built around communication, coordination or a sudden change of plan.