Auto Mode: It has an "auto" setting that allows it to automatically recognize what it is measuring and act accordingly, for the most common measurements, AC or DC Volts, resistance or continuity. All you have to do in this smart mode is attach the probes, and it will work. Multi-function: The ST600 multimeter can measure a maximum of 600V AC/DC voltage, 10A AC/DC current and 60M Ohms resistance. Upgraded and Convenient: Replace the gear knob with 2 buttons, use it like a smartphone. More convenient than a meter with only 1 function button, you can manually select the function on the left or right. The jack is on the front, so the multimeter can be placed upright. Safety First: The kit comes in a semi-rigid zippered case, the multimeter has a snug rubber holster that fits around the back and sides for extra protection. IEC CAT III 1000V, CAT IV 600V, CE, RoHS certified. Anti-Burn with dual ceramic fuse and thermistor protection circuit. High voltage protection is active on all ranges. Color Display: It is shaped like a phablet with a bright and clear LCD display. Different colors separate the readings from the functions and make it easy to record the results. It has a LED light on the back, an indicator light on the top and 3 flashing lights on the port, looks good and easy to use.