1. Features -Pocket-size unit with economical price, widely used in production lines, workshops and labs. -Wide measuring range suitable for most materials, and applicable for flat, outer cylinder andsloping surface -Ragged design device with a long lifetime, while keeping the accurate and reliable data results -Both Ra and Rz measurement range -All calculated measurement results shown on its LCD back-lit display hardly after testedo -lndicator and alarm for low battery, out-of-limit values and dysfunction -Chargeable Li battery and improvement of the circuits function. -lmprovement and Protection for sensor to secure the high accuracy and good stability. -Conforms to ISO and DIN