The United Scientific™ Eco-Mix Vortex Mixer has a simple touch-and-go function that makes it easy to use. The compact design saves bench space, yet the mixer is powerful enough to deliver robust vortex mixing at 3000 rpm. Compatible with centrifuge tubes up to 50mL capacity, and can also be used with test tubes. Compact design Constant speed mixing at 3000 rpm Accommodates centrifuge tubes up to 50mL Technical Specifications: Motor Type: Brushless Speed: 3000 rpm Shaking Orbit: 4.5 mm (circular) Maximum Centrifuge Size: 50mL Heavy-duty zinc alloy base Input Power: 12W Operates on 115V / 60 Hz