The tone generators are a square wave and a sawtooth oscillator. The level can be set for each oscillator and the frequency range is selectable between high and low.
A variable frequency control is possible only via photo resistors on top of the unit which makes the Lumanoise V1 so outstanding. The oscillator are not at the same base frequency which provides for frequency beating, so typical for drones.
A 12dB low pass filter with resonance sapes the sound. The cutoff frequency can be set either with the potentiometer (working in opposite direction, by the way) or another photo resistor.
input for external power supply, 9-12V DC, center positive
1/4" audio out mono
117 x 83 x 55mm