1. A Variety of Values: With high definition bright screen, one key conversion, one measurement can display 7 kinds of hardness values (HLD, HB, HV, HS, HRA, HRB, HRC). 2. Multi-Function: Data saving function, easy to record and view. 10 minutes automatic shutdown function. 3. High-Precision Measurement: Accurate measurement value, display value error ± 6% (HLD = 800), display value repeatability of 0.8%; can automatically calculate the average hardness value. 4. Easy to Use: The hardness tester supports "Forged Steel" materials. When testing "Forged Steel" specimens with the D-type impact device, the HB value can be read directly, eliminating the need for manual tabulation. 5. Wide Application: Widely used in manufacturing, metal processing industry, chemical industry, commodity inspection and other testing fields. Is the material non-destructive hardness testing professional necessary instrument. Measuring Direction: Support 360º (vertical down, slant down, horizontal, slant up, vertical up) Measuring Range: (170-960)HLD, (17.9-69.5)HRC, (19-683)HB, (80-1042)HV, (30.6-102.6)HS, (59.1-88)HRA, (13.5-101.7)HRB Hardness Unit: Richter (HLD), Brinell (HB), Rockwell B (HRB), Rockwell C (HRC), Rockwell A (HRA), Vickers (HV), Shaw (HS) Display Value Error: ±6% (HLD = 800) Display Value Repeatability: 0.8% (HLD = 800) Display: Industrial-grade 128 x 64 graphic dot matrix LCD liquid crystal Power Supply: 1800mAh rechargeable lithium battery Continuous Working Time: About 20 hours Operating Conditions: Operating temperature -10℃-50℃ Storage Temperature: -30℃-60℃ Relative Humidity: ≤ 90% Applicable Materials: Steel and cast steel, alloy tool steel, stainless steel, gray cast iron, ductile cast iron, cast aluminum alloy, copper-zinc alloy (brass), copper-tin alloy (bronze), pure copper, forged s