4 免版税 音轨，用于"读者"

How does a mobile credit card processing system work?.

We are in a supermarket and we hear the sound of the barcode reader. Estem a un supermercat mentre la caixera està passant els productes pel lector del còdi de barres.

Original toyota etc (electronic toll collection) card reader with female japanse voice saying "there's no card inserted". Jdm sound.

This is the sound of the self-checkout at a retail department store. There is also an alert to remind you to remove your credit card from the reader.