Set the fill and empty speeds independently to fast, medium, or slow. Additional speed control is provided depending on how far each button is depressed. Features a built-in pump—there are no power lines or tubing to drag around. Measures only 7" high, making it ideal for use in the lab or field. Bodies are constructed of Delrin® plastic. Removable nosepiece is autoclavable. Operates on a rechargeable nickel metal hydride (NiMH) battery. Can be used continuously for two hours before recharging is required.