The HTW-X4 microplate shaker is a high-speed shaker specifically designed for microplates and cell culture plates, using a direct current brushless motor and a microcomputer. The large LCD screen displays the countdown time and speed, and the operation interface is simple to understand. The locking mode of operation prevents misoperation. The direct current brushless motor drives, with low noise, accurate speed, long life and maintenance-free. Soft start and uniform acceleration effectively avoid sample splashes. The molded shell prevents accidental acid and alkali solution from corroding the machine and is easy to clean and maintain. A RS232 interface is optional and can be connected to a computer via the RS232 interface to set the instrument parameters and display the working curve in real time.