IPRE Portable Surface Roughness Tester PRSR110 Website: www.iprecn.com Features Dual OLED displays to suit your applications 2 start keys ( the left key & the right key) to satisfy the different using habits Mobile app compatible to get the higher accuracy, convenient to be used in a small space ARM processor to offer higher speed, low power consumption and fast accurate measurement Light weight of 150g� easy & convenient to use Main Technical Specificitions Optional Parameter Ra, Rz, Rq, Rt Measuring Range�μm� Ra, Rq� 0.05 ~ 10.0;Rz, Rt� 0.1 ~ 50 Sampling Length�mm� 0.25/ 0.80/ 2.5 Evaluation Length�mm� 1.25/ 4.0/ 5.0 Running Length�mm� 6 Display Accuracy 0.01μm Display Deviation ±�7-10�% Display Repeatability �12% Stylus Radius 10 μm±1 μm Static Contact Force � 0.016N Force Change Rate � 800N/m Sensor Lead Pressure � 0.5N Battery 3.7V Lithium Rechargeable battery Dimensions in mm 110�81�32 Weight 150g Standard Delivery Main Unit 1 pc calibration block 1pc Power adapter 1pc USB cable 1 pc Manual 1 pc Packing list 1pc