1. Add one fluorescent tube to view inside clearly. 2. With safety switch to stop shaking when opening door 3. Three-point bearing transmission is adopted suitable for heavy loads and continuous duty . Variable speed range. Allows the user to select desired shaking speed . 4. Uses brush less AC motor for long durability and stable performance of the shaking system. 5. With 3-tier transparent glass in the center for viewing inside. 6. Digital display actual r.p.m and setting r.p.m. User can set speed from30 to 250 r.p.m and timer from 999 hour, minute, second. 7. LCD microcomputer PID controller ,2-screen digital display. 8. Screen-touch (Power ,Cooler ,Shaker, Lamp) (the current pass through switch is lower than 15Ma).