The speed adjustable digital display microcentrifuge is perfect for quick spin down with 2 speed option. 500-7000rpm and 500-12000rpm. the multi-rotor can be for 12×1.5ml/2ml microtube and 8×0.2mlx4 PCR strips. The other rotor can be for 12x 0.2ml PCR strips. Reliable and durable DC permanent magnet motor. Wide speed range 500-12000rpm,accuracy ±9%. RPM step increase 500rpm. Timing control 1-99min or 1-59sec.