The ZD-9550 functions through adjusting the swinging angle, and shaking speed. The unit operates in a stepless speed regulation of 20 up to 65 rpm. It is designed with a digital display, and rock shaker. Also, the equipment provides a platform size of 10.6 in x 10.6 in, and dimension of 10.4 in x 10.4 in x 6 in.