Can I switch on/off a projector using WatchON on the Samsung S4 mini?

You can turn a projector on but I've yet found a way to turn it off. It's still a great way to troll teachers.

You can control your TV, cable or satellite box with the IR blaster of the Samsung Galaxy S4 using WatchON. No information though if you can use it with a projector. Contact the developer for further information ➔ click here.

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