This unit sets the new standard in vortex mixing with its advanced Q-Drive technology. It provides smooth instant vortexing of even the largest sample sizes, including full 50ml tubes. The unique counter balance system creates maximum vortexing action, while minimizing noise and excessive vibration. This results in quieter, more efficient and longer lasting operation. Other features include: "no-walk" suction feet, cold room/incubator compatibility and spill-roof electronic controls.