Back-up beeper
So, you know how sometimes big trucks or construction vehicles make loud beeping noises when they're moving backwards? That's what we call a back-up beeper.
You see, when these vehicles are backing up, they can't always see everything behind them, especially if there are people or other things that are low down or hidden from view. The beeper makes a loud noise that helps alert people nearby to move away and be careful.
It's just like when you hear a fire alarm or smoke detector beep - it's telling you that something important is happening and you need to be aware and safe.
Just remember, whenever you hear a back-up beeper, make sure to move out of the way and be very careful.
You see, when these vehicles are backing up, they can't always see everything behind them, especially if there are people or other things that are low down or hidden from view. The beeper makes a loud noise that helps alert people nearby to move away and be careful.
It's just like when you hear a fire alarm or smoke detector beep - it's telling you that something important is happening and you need to be aware and safe.
Just remember, whenever you hear a back-up beeper, make sure to move out of the way and be very careful.