It uses light (as opposed to a theremin which uses capacitance). Two LEDs emit light just off the visible spectrum - I'm guessing utraviolet since they look dimly purple when the device is turned on - which is reflected back into a sensor by your hand or other objects held above.
2020-04-02 15:58:20 +0000 UTC
So the commander works like a theremin? Interesting. I think you had shown that before. i don't know why i do not remember it. Anyway, glad you had fun ❤️