Feature: 1. Portable Hardness Tester: Quickly and accurately measures the hardness of common metal materials, suitable for laboratory and field use. Offers multiple measurement settings for various needs 2. Wide Application: This digital hardness meter is suitable for use in manufacturing, chemistry industry, metalworking, and inspection fields. A practical device for non destructive material hardness testing 3. High Visibility LCD Display: This portable hardness tester features high brightness LCD display with backlight function for clear visibility even in sunlight, suitable for various measurement conditions 4. Accurate Measurement: High accuracy measurement circuit ensures an error of ±6% and a repeatability of 0.8% (HLD=800). Supports multiple hardness scales: HLD, HRC, HRB, HRA, HB1, HB2, HV, HSD 5. Multiple Functions: Automatically calculates hardness average. No manual lookup required when testing steel samples with D type impact device. Data saving function for recording and viewing. 10 minute auto shutdown 6. Power Supply: Built in 1800mAh rechargeable battery, provides long endurance, making it easy to use the hardness tester anytime and anywhere; Type C charging port, compatible with most digital products such as phones Specification: Item Type: Metal Hardness Tester Hardness Standard: HL, HB, HRB, HRC, HRA, HV, HS Display Error: ±6%(HLD=800) Display Repeatability: 0.8%(HLD=800) Display: Industrial Grade 128x64 Graphic Dot Array LCD Power Supply: 1 x 1800mAh Rechargeable Battery (built in) Continuous Working Time: About 20 Hours Working Temperature: -10-50℃ Storage Temperature: -30-60℃ Relative Humidity: ≤90% Material Hardness Impact Device D DL Steel and Cast Steel HRC 17.9-68.5 20.6-68.2 HRB 59.6-99.6 37.0-99.9 HRA 59.1-85.8 HB 127-651 81-646 HV 83-976 80-950 HS 32.2-99.5 30.6-96.8 Forged Steel HB 143-650 Alloy Tool Steel HRC 20.4-67.1 HV 80-898 Stainless Steel HRB 46.5-101.7 HB 85-655 HV 85-802 Grey Cast Iron HRC HB 93-334 HV Nodular Cast Iron HRC HB 131-387 HV Cast Aluminum Alloy HB 19-164 HRB 23.8-84.6 Brass HB 40-173 HRB 13.5-95.3 Bronze HB 60-290 Copper HB 45-315 . Package List: 1 x Hardness Tester 1 x Accessory 1 x Test Head 1 x Brush 1 x User Manual 1 x USB Cable 1 x Plug