Features:The RCD Tester brings the latest technology into an instrument which is compact, firm, durable, simple to use and convenient to carry.It can measure Trip-Out Current,trip-out time,Contact Voltage, loop resistance100 groups of test result can be storedData stored in host machine can be transmitted to PC via a USB2.0 interfaceFeatures backlight Indication, Auto Power Off,Auto/manual rangeWith the function of overheating Alarm, Low Battery Voltage AlarmHigh reliability, stability and accuracy. It is the ideal tool for electrical inspection and repair.Specifications:Brand: PEAKMETERAC voltage measurement: 0V-440VFrequency measurement: DC,45Hz-65HzMultiplying power of measurement current: 0.5, 1 and 5Standard/selective type current measurement lever: 10, 30, 100, 300, 500mAPower supply: 6x 1.5V AA batteries(not included)Storage elevation: 12,000mUsage elevation: 2,000m CAT III 600V; 3000 CAT II 600VSize:195*155*80mm/7.68*6.1*3.15inWeight: 2194gPackage includes:1 * RCD/LOOP Tester MS5910(batteries not included)1 * Test Lead3 * Crocodile Clip1 * USB Cable1 * CD1 * Instructions1 * Black Bag1 * LanyardNote:It supports loopresistance (RL) measurement, and it can be displayed at a minimum of 3 ohms. This model with a measurement result of 1-2 ohms is not supported..