1.Composite shell, shatter-resistant2.The electronic braking system for rapid sample processing3.Quick release rotor tub, allows for easy rotor exchange4. HMC-6KS / HMC-6K Two speed options: 4,000 & 6,000rpm5.HMC-6KS: 3-in-1 rotor design, high capacity and time-saving --6x1.5/2.0ml tubes, --6x0.5ml tubes, --2-8x0.2ml PCR strip tubes