Fowler 54-100-167-0 Stainless Steel Ultra-Cal V Electronic BLUETOOTH  Caliper with, 6"/150mm Maximum Measurement, 0.0005"/.01mm Resolution Comes with a Lifetime Warranty against materials and workmanship, Blootooth wireless communication Measures 0 to 6"/0 to 150mm with 0.0012"/30m accuracy, and 0.0005"/0.01mm resolution for precise measurements, Hardened stainless steel frame for corrosion resistance and long life Digital, single-value readout LCD shows inch or metric units for versatility when measuring Absolute and relative modes to take intermediate or differential measurements Statistical Process Control (SPC) data collection with wireless output transfers data to a computer without using a cable