Accuracy of Cole-Parmer E-Burette is ± 0.2% and able to perform precise titrations within the error limits of 'Class A' glass burettes. 20 results can be saved in the memory. Computer connectivity is available through a micro-USB cable for transferring and recording data. Rechargeable, long-life, replaceable batteries are provided in the control panel. Amber colored window is provided as an accessory for those chemicals/reagents that are sensitive to light