In the video, he has the top cover off the unit and you can see the revolving drum and each of the 8 or so magnetic heads that read from the drum as it turns.
This is the metal distortion pedal from Donner Company with the name of Metal Head, which is also a pure analog circuit metal distortion pedal. And maybe it's the smallest analog distortion effect ever. The improvement of the high frequency of the pedal makes the heavy tone-color and difficult skills perform in a clearer level. Entirely gaining and boosting the distortion degree of metal, has the special and strong distortion effect. Great tone, easy and perfect operation. It would be easy for you to design own guitar sound in different live performances. Although Metal Head has a small size, it is equipped with complete basic adjustment knob. There are three function knobs, namely VOLUME, TONE and GAIN. VOLUME is used to set the effect output volume. TONE is to set the effect brightness of tone. GAIN is used to set the gain of distortion sound. Two models: BOOST and NORMAL. True bypass switch lets your instrument's signal pass through a non-electronic bypass line when the effect is disengaged, feeding your amp with direct, unaltered signal from your instrument.
Can someone tell me... what the hell is pictured on the face of this distortion pedal?