testing this very cheap china remote with gyro mouse mode. The ok button didn't work, so I tried flashing new firmware, that seemingly bricked it. But I then found a different file and it now works almost right. ... but only with the dongle, it's still broken on Bluetooth. It sends some weird code Linux can't understand, different from both mouse and keyboard (I tried it with wireshark). Anyway, the dongle is acceptable. It can also learn IR codes if you have a real TV.