Did you find an item bearing a KeepZeLink QRCode ?
You only have to flash the QRCode with your smartphone if you already have an App for this (such as Scanbot, QR Reader or any other free App)
OR :
If you don’t have a QRScanner, you may otherwise type here the number which is just below the QRCode and click on « VALIDATE » :
Whatever the way you do it, you will be then able to send a message to the owner of the QRCode ; He /she will receive it immediately by text message and by email.