1.[Accurate Liquid Extraction]-Lab pipette Volume Range: 0.1ul to 1000ul. Increase or decrease the volume of aspirated liquid by rotating the piston button.The digital window display allows for more accurate volume set up and easier volume recognition. 2.[Guaranteed Quality ]All pipettes are factory calibrated and adjusted to give the volumes as specified with distilled or deionized water to make sure highly accurate.Each pipette supplied with an individual test certificate.Patent technique with nearly 20 years manufacturing experience guarantee . 3.[Easy to Use ]-Light weight and designed for ergonomics, adjustable rotation, flexible for convenient manual operation.It has a blow-out function when draining liquid, and no liquid remains. 4.[ ]- series pipettes are made of chemically resistant materials and the pipette tips are removable.If the volume is inaccurate when used, it can be recalibrated with an analytical balance and continue to be used. Long lifetime over 100,000 times pipetting. 5.[Wise Use ]- for laboratory, industrial, food, cosmetic experiments, pool water testing and general chemical sampling, etc.If you have any issue, we're always here to help you.