Dynatone Corp. has been majoring in producing digital piano since 1987. Dynatone does everything from designing and manufacturing to selling their fine instruments world wide. It continues to invest in future technologies and uses skilled and respected musicians to help develop good quality products.Its dedication to achieving piano sound has enabled it to produce the upgraded Real full-orchestra sounds ROS V.4 and new stereo-sampled dual-velocity RPS V.4 grand piano sound. The new Advanced Real Hammer Action ARHA keyboard is the result of years of research into the needs of the pianist. The ARHA is designed for a heavier feel in the lower range and lighter feel in the upper range, creating a touch that is just like an acoustic grand piano.All dynatone's products meet the safety standard of CE, UL and FCC.