The ADM-931 digital multimeter is suitable for use by electricians, electronic engineers, general industry and laboratories. They are EN61010-1 CAT III 600V, CATII 1000V rated. A large high-contrast LCD display, a single positive action rotary selection and only 4 function buttons make them easy to use. Impact-resistant rubber and ABS plastic case with a flip out desk stand 34mm LCD display with large digits, 61 segment bargraph and function indicators with backlight Measuring rate of 2 times per second Auto polarity indication Auto ranging with range hold Data hold Min/max recording mode Fast blow fuse for overload protection Operating environment 0C to 50C at