Features:Multifunctional for measuring the trip current, trip time, loop resistance of switch leakage, and the voltage, frequency of on-line voltage, RCD(earth leakage switch), AUTORAMP(triggered current).Functional features of the measurement of jump-off current, jump-off time, contact voltage, loop resistance.Up to 1000 sets of test results can be stored, convenient for further inquiry.Data stored in the can be uploaded to a PC via the USB 2.0 interface.The portable resistance tester is easy to use and has stable performance.4.7-inch LCD screen with backlight for conveniently checking the test in the low lit condition.with low battery indication.Perfect for the electricians to do testing, inspection, and repairing.Specifications:Material: ABSColor: black+redAC Phase: Voltage Measurement: 0~440VFrequency Measurement: DC, 45~65HzTest Current Magnification: 0.5, 1, and 5Fast/Slow Current Test Gears: 10, 30, 100, 300, 500mASafety Level: III 1000V, IV 600Max. Common Mode Voltage: 600V AC Display Type: LCD displayRange : Fully automatic rangeFrequency Detection: AutomaticOver-range Display: " "Power Consumption: 100mWOperating Temperature & Altitude: 0~40, 2000mStorage Temperature & Altitude: -20~70, 12000mPower Supply: 8 x 1.5V AA battery (NOT included)Item Size: 190 x 140 x 68mm / 7.48 x 5.51 x 2.68inPackage Contents:1 x Tester1 x Test Lead3 x Clip1 x USB Cable1 x CD1 x Storage Case1 x English ManualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.