Control your presentation with your Smartphone. For this you need to install PPTControl Desktop on your computer. After the installation you can select the computer on your device. While selecting a request is sent which can be accepted in the PPTControl Desktop application. After successful pairing you can block new requests so that only you have control over your presentations.
PPTControl Desktop can be downloaded from https://bastian-aunkofer.com/pptcontroldesktop.

Conditions:
To establish the connection Bluetooth is required. Therefore this device as well as the computer must support Bluetooth.