Lost my salange hy300 remote, here's a solution!
South America redditor here!!
So, a while ago I went on vacation with my boyfriend and I MANAGED to forget my little HY300's remote back at home. We used A USB CABLE-MOUSE to move the cursor around, surprisingly it works! He further downloaded a bluetooh remote-controling app on the projector and on his phone so we could use his phone as a controller wirelessly.
Universal Control apps DON'T WORK AT ALL, as the infrared receptor does not work on this model.
Cheers to all who lost their remotes too, don't give up your projectors!!!