buzzer

/ˈbʌzər/

buzz·er

BrE /ˈbʌzə(r)/

NAmE /ˈbʌzər/

an electrical device that produces a buzzing sound as a signal

at the ˈbuzzer

(NAmE)

at the end of a game or period of play

He missed a three-point attempt at the buzzer.