Presentation remote can control the PC for presentation through WiFi.
Please install a server software on windows then you can use this app the server software is free.
Check this link below:
https://www.monect.com/pc-remote

features:
1. Blackboard
2. Touch pad & keyboards
3. Project the phone's or pad's screen photos or videos to the PC for presentation.
4. Transfer the PC's screen to phone or pad and control it directly.
5. Power point control.

Note: if the phone or pad cannot find the PC for presentation please check the firewall setting on PC which may block the connection.