Backlit large screen: Power night operators, measuring readings, easily respond to nighttime environment. Continuous measurement function: Connect the measured object, press the test button and turn the knob clockwise. At this time, the instrument starts the continuous measurement state. The buzzer intermittently emits “beep and bang” sounds, and the LCD screen displays during the test. Timing measurement function: The timing measurement is to set a time in the instrument and automatically enter the set time Take a measurement. Multi-range voltage selection: 4 positions for you to choose, measure high / low pressure, shift can be measured, convenient and quick. USB transfer function (only AR3126/3127 has USB connection): It can be connected with the computer via USB, with data record download, real-time data sampling analysis, printing charts and data and other functions.