Features: *Mental housing is sturdy and durable. *Auto-balancing system can extend motor life and reduce noise. *With safety interlock, it can prevent the lid from being opened during operation. *Forced fan air convection prevents the motor from overheating. *Precision digital time can be set from 0 to 30 minutes with 30 sec. increment. *DSC-301SD can offer short runs by pressing the function key. *LED digital display enables users to monitor the present speed value or the remaining time. *Automatic brake system can offer rapid deceleration. *DSC-301SD features a see-through window. *The lid will be opened automatically once the rotor stops spinning. *Quality certification: ISO 9001, ISO 13485.