JOYO TECHNOLOGY is a professional company specializing in R&D, manufacturing and marketing digital products for music education. Their main products is guitar effect pedals. They make some great cheap priced distortion pedals. Cheap does not mean lacking on quality, Most are built like tanks to withstand the rigors of touring.
Through product R&D, and with the strong support of a number of industry specialists, JOYO possesses its own acoustic core technology and has applied for several utility patents.