Portable Handheld Miniature design: Aluminum alloy housing, palm-sized, suitable for measuring cavities and confined spaces. 360° full-angle measurement: Supports testing in any orientation, including inversion, to accommodate complex working conditions. Multiple hardness scales: Supports HL, HRB, HRC, HV, HB, and HS, meeting the testing needs of various metal materials. Smart storage and calibration: Stores 50 sets of data, supports user calibration, and facilitates statistics and printing. Low battery reminder and automatic power off: Features a battery level indicator and manual/automatic power off for energy efficiency., Manufacturer: MTHCKXJBSUZ