Eppendorf 022620444 5424 Microcentrifuge with Keypad Control and Rotor, for 24-place 1.5/2.0mL Microcentrifuge Tubes, 120V/60Hz Power: 120V/60Hz; rotor capacity: 24 tubes; tube size: 1.5 to 2.0mL; number of rotors: 4 Includes certified aerosol-tight lid and rotor for safe use with hazardous materials and a unique, contoured OptiBowl rotor design to reduce noise Features a smooth operating keypad surface for easy wipe-down cleaning Five digit speed display and a 'molecular grade' speed of over 21,000 x g Other features include: SHORT spin speed limitation, SOFT brake to protect delicate samples 'At Set RPM' function, and adjustable end-of-run volume alarm