Features *  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 timer can be set to 30 minutes with 1 sec. increment. Digital speed setting is with 100rpm     increment. *  DSC-302SD can offer short runs by pushing the function key. *  LED digital display enables users to monitor the time, speed and RCF value. *  Automatic brake system can offer rapid deceleration. *  DSC-303SD features a see-through window. *  The lid will be opened automatically once the rotor stops spinning. *  Quality certificate: ISO 9001, ISO 13485