Shaker features 180 degree rotation of two vessels simultaneously with speed control from 2 to 30rpm. Sturdy 3 prong laboratory clamps can accommodate vessels up to 2.25in in diameter and 10in length. Designed to operate in an incubator or cold room. DC filtering allows the motor to run cooler and promotes longer motor life. Base configuration prevents walking. Fuse protected, with on/ off switch, variable speed control knob and six foot 3-wire grounded cord. 240V, 50/60Hz, CE Rated.