Select the volume by rotating the button, which is time-saving and convenient. (For example, from 0.1ul to 1050ul, just press once. Any volume you need can be reached in one second) No manual, no mode, the machine can respond to what you want. (No need to set any mode, just press the main button from one mode to another. The machine can automatically reach any mode within one second) Built-in more than 15 pipetting modes to meet any test requirements Rechargeable battery can ensure that the machine works for a long time The cover will never change color, and the tip and piston can be sterilized at high temperature