Review on Digi Pas Machinist DWL1300XY Bluetooth NIST Traceable by Iration Mccall

Used to align some router bits at my home shop. Plan to use in the near future to accurately align the pillar/mount of a telescope used for astrophotography. The product has a precision base and is easily set up for absolute level measurement by simply taking two measurements 180 degrees apart. Factory calibrated and supplied with a calibration data sheet. Can be user calibrated but I didn't as the factory calibration is fine for my needs. The only thing I would note a little negatively is that two AA batteries are not included in the kit and thankfully it comes with a small graphic. How the batteries should be installed as the +/- markings may be ambiguous for some as to whether or not the markings refer to the end of the battery closest to the user as the batteries slide lengthwise.