Function & Features: - Metal shell, stronger and anti-electromagnetic interference - Adapt high speed DSP processor to get fast measurement - With OLED dot matrix indicator - Application for measuring flat surface, conical surface and also groove larger than 80*30mm - With ISO/DIN/CE/JIS/FCC standards - Power supply: 3.7V rechargeable Li-ion battery Roughness parameter: Ra, Rz, Rq, Rt Measuring Range: Ra: 0.05-10.0μm | Rz: 0.1-50μm Resolution: 0.01μm Warranty: 1 year warranty subjected to terms and conditions For more detail please visit at https://matrixintegrity.com/surface-roughness-tester-leeb456/ or email at salesmatrixintegrity@gmail.com Price does not include additional taxes, fees and surcharges. Please note pre-order usually takes about 1-4 weeks.