Biohit Midi Plus of the Biohitfamily is a lightweight cordless pipetting controller for all commonly used glass or plastic pipettes, but can also be used with the Biohit Proline 5 mL and 10 mL disposable tips. The speed can be fine-tuned by applying varying finger pressure to the operating buttons. The Midi Plus can be suspended using a unique spring loaded accessory. When pipetting the Midi Plus can be pulled down to an ideal working height, held in place by tension and locked in position. This optional accessory is ideal for reducing the strain associated with long operating periods. Features include: precise fingertip control of variable speed ranges; hydrophobic autoclavable filter prevents overaspiration; linear speed control; low battery warning.