The main effect is that when you don’t want to wear a seatbelt

(such as driving a car at a short distance or driving after a meal),

the seatbelt indicator lights up for a few seconds to indicate,

or it always goes off until you fasten the seat belt,
depending on the model, Some cars will also have audible warnings,

and they will not even start the engine. . .

Plugging in the seatbelt will automatically turn off the beeping tone or indicator light.
When you don’t want to fasten the seatbelt, you can solve these troubles.

No need to tie straps, just plug it into the socket