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 resistance 100 groups of test result can be stored Data stored in host machine can be transmitted to PC via a USB2.0 interface Features backlight Indication, Auto Power Off, Auto/manual range With the function of overheating Alarm, Low Battery Voltage Alarm High reliability, stability and accuracy. It is the ideal tool for electrical inspection and repair. Specifications: Brand: PEAKMETER AC voltage measurement: 0V-440V Frequency measurement: DC,45Hz-65Hz Multiplying power of measurement current: 0.5, 1 and 5 Standard/selective type current measurement lever: 10, 30, 100, 300, 500mA Power supply: 6x 1.5V AA batteries(not included) Storage elevation: 12,000m Usage elevation: 2,000m CAT III 600V; 3000 CAT II 600V Size:195*155*80mm/7.68*6.1*3.15in Weight: 2194g Package includes: 1 * RCD/LOOP Tester MS5910(batteries not included) 1 * Test Lead 3 * Crocodile Clip 1 * USB Cable 1 * CD 1 * Instructions 1 * Black Bag 1 * Lanyard Note: It supports loop resistance (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. .