... impact device, it induces an electric voltage which is proportional to the velocity of the impact body.KEY FEATURES•High accuracy ... range: Rockwell B&C, Brinell, Vickers, Shore and HL•Automatic conversion to Brinell, Rockwell, Vicker and Shore•Test in any directions•Impact ... •Menu operation•Large LCD display with backlight•RS232/USB interface to PC and micro-printer•Automatic mean, max., min. value ...