This model is loaded with features and improvements, such as higher speeds for faster and cleaner separations, quieter operation for peaceful work environments, lower chamber temperatures for cooler test-tube samples, shorter height to fit under any cabinet, and auto-calibrating speed function for precision results. It even has an auto-brake to stop the rotor in less than 30 seconds to save time in the busy labs. Now the E8 family also includes a digital model, with no knobs and precise time and speed programs for CLIA compliance and the highest accuracy at an affordable price. Choose the FIXED-speed model for spinning blood only, or choose the VARIABLE-speed or DIGITAL models for spinning blood, urine, fecals, semen, and other fluids at the correct speeds for proper separations and clear results.