You can share the screen of your PC or Mac on your Keecker.
On the PC, you have to:
1) Use Chrome as your browser
2) Download and launch the Google Cast extension
3) Choose to caster on your Keecker.
On Mac, you have to:
1) Download an application (such as AirScreen) on your Keecker (from Google Play)
2) Activate Apple AirPlay functionality on your Mac
3) Connect AirPlay to the AirScreen application. Your Mac and your Keecker must be connected to the same Wifi.
NB: some applications mentioned here may be subject to a fee.