Advantages Large screen,show all functions and parameters. Test at any angle.Wide measuring range. Measure hardness of all metallic materials. Direct display of hardness scales HRB, HRC, HV, HB, HS, HL. Seven impact devices are available for special application.Automatically identify type of impact devices. Large capacity memory(500 groups). Upper and lower limit can be preset.It will alarm automatically when result exceeding the limit. Battery information indicates the rest capacity of the battery and the charge status.User calibration function.USB port with PC data proceeding software. Original imported thermal printer support the immediate printing.NI-MH rechargeable battery as power source.Continuous working no less than 150 hours (EL off and no printing). Auto power off to save energy. Excellent after-sale service for high quality products-two years?? guarantee and all life mainten. Angela Bai Email:mitech_b@mitech-tech.com Skype:angela8808131