■ Linear ball bearings for ten million times use ■ Absolute encoder, the original data remains after power off ■ Reading in digital and analog ■ Supplied with RS232 cable (with software) ■ Button: tolerance, data preset, data hold, measuring direction change, max./min./TIR, power off time, on/off, mm/inch, resolution adjustment ■ Power: rechargeable battery, for 24 hours continuous working(full charge)