4 terminal devices for accurate measurement of very low resistance. Ideal for measuring the resistance of components precisely. Ideal for testing protective conductors, lightning conductors and welded points. Maximum test current is 10A ( 60000u range only ). Wide measuring range, 1 u - 6K , 6 ranges. Two working modes: Resistive and Inductive. Good / Fail set-function for input quality control. Built-in in buzzer sound (GOOD STATUS) to assist with Q.C. testing. #34;CALCULATE #34; function to measure cable / wire length. Built-in over input protection. 4 wires with 2 Kelvin clips included. RS232/USB interface DCV Power Supply: via AC/DC adapter, 90-260 ACV/DC USB cable, USB-01 option Data acquisition software SW-U801-WIN option Excel data acquision software SW-E802 optional