Wide Material Compatibility:Supports testing on both Plastic and Aluminum materials, with a measuring range of 0–100 Hba and equivalent to 25–135 HBW. High-Resolution Display:Provides 0.1 Hba resolution for precise reading of hardness values. Clear Indication & Repeatability Accuracy :Offers indication error of ±1 Hba (81–88 Hba) and ±2 Hba (42–48 Hba); repeatability error of ±1.5 Hba (81–88 Hba) and ±2.5 Hba (42–48 Hba). Multi-Scale Conversion:Equipped with automatic conversion among HL, HRC, HRB, HB, HV, HSD hardness scales. Convenient Battery Operation:Powered by 2 × 1.5V AAA (UM-4) batteries, ensuring portable and easy field use., Manufacturer: MERHOVO