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 host can be uploaded to a PC via the USB 2.0 interface. The compact portable resistance tester is easy to use and has stable performance. 4.7-inch LCD screen with backlight for conveniently checking the test result in the low lit condition. Powered by 6pcs 1.5V AA batteries(not included), with low battery indication. Perfect for the electricians to do testing, inspection, and repairing. Specifications: Material: ABS AC Phase: Voltage Measurement: 0-440V Frequency Measurement: DC, 45-65Hz Test Current Magnification: 0.5, 1, and 5 Fast or Slow Current Test Gears: 10, 30, 100, 300, 500mA Safety Level: CAT III 1000V, CAT IV 600 Max. Common Mode Voltage: 600V AC RMS Display Type: LCD display Range Selection: Fully automatic range Frequency Detection: Automatic Over-range Display: quot gt quot Power Consumption: 100mW Operating Temperature Altitude: 0-40, 2000m Storage Temperature Altitude: -20-70, 12000m Power Supply: 8 x 1.5V AA battery (NOT included) Item Size: 190 x 140 x 68mm or 7.48 x 5.51 x 2.68in Item Weight: 948g or 33.47oz Package Weight: 1544g or 54.47oz Package Size: 33.5 x 27 x 9cm or 13.19 x 10.63 x 3.54in Packing List: 1 x Tester 1 x Test Lead 3 x Clip 1 x USB Cable 1 x CD 1 x Storage Case