noun
buzzer; personal alarm
Refers to any device that makes a buzzing sound, including doorbells, game-show buzzers, and personal safety alarms.
夜道を歩くときは、ブザーを持っていると安心です。
When walking at night, it's reassuring to carry a personal alarm.
クイズ番組で、答えがわかったら
On the quiz show, please press the buzzer when you know the answer.