The LabGenius Mini-Vortex Mixer is a tiny titan specifically designed for shaking test tubes. Simply push the tube into the soft attachment to start shaking. Shaking stops as soon as you lift out the test tube. Full containers of 50mL can be activated for mixing within 5 seconds! The unit operates at a fixed speed of 3,000 rpm with an orbital diameter of 5.5 mm. Remarkably small footprint – just 4 inch diameter – and compact structure are perfect for the limited spaces of bench tops and fume hoods. It also has patented foot pads that keep the petite unit firmly in place while mixing. Its power supply meets CE, cULus, CCC, SAA, FCC and GS standards. Weight is just 0.55kg.