Info regarding the Inviter Proximity Mobile Marketing Tool
https://za.inviter.io/

From the website

The future is Mobile. For many, it is the gateway to the Internet. As the world becomes increasingly mobile, many digital
marketers seek to reach mobile audiences in real-time with relevant messaging that drives results they can measure.

Meet Inviter. The latest generation Bluetooth Proximity Mobile Marketing system that allows you to broadcast messages to almost any Android device that is located within a 300-metre around your business location at any time.

 How it works: https://youtu.be/A_3OPGk2JwM

Sandton Central example:  https://youtu.be/HeZnQSQ06JA

Property Owner example: https://youtu.be/iMDFEyZd658