Feature: 1. LCD DISPLAY: The resistance meter adopts a black screen design, with resistance current displayed on the same screen. Multi functions such as real time clock, data storage, data retrieval, alarm, and automatic shutdown. 2. EXCELLENT PERFORMANCE: The resistance tester has the advantages of wide range, high resolution, convenient operation, accuracy, reliability, stable performance, and strong anti interference ability. 3. GROUNDING RESISTANCE TEST: Mainly applicable to measuring the grounding resistance of various telecommunications, power, meteorology, computer rooms, power distribution lines, tower transmission lines, gas stations, factory grounding grids, etc. 4. HIGH ACCURACY: The clamp type grounding resistance tester is controlled by a microprocessor and can accurately detect grounding resistance. Uses fast filtering technology to minimize interference. Simultaneously storing and uploading data. 5. APPLICABLE FIELD: This clamp meter is a commonly used for industrial enterprise departments in telecommunications, electricity, meteorology, computer rooms, oil fields, electromechanical installation and maintenance, as well as the use of electricity as industrial power or energy. Specification: Item Type: Ground Resistance Tester Mode: ETCR2100C+ Material: ABS Battery: 1.5V AA battery x 4 (shipped without battery) Basic Parameters: Function: Grounding resistance test, circuit resistance test, leakage current test Resistance Range: 0.01 ?? to 1200 ?? Current Range: 0-20A Current Resolution: 0.05ma Resistance Resolution: 0.001 ?? Data Storage: 99 sets Audible and Visual Alarm: "beep beep beep" alarm sound, press the AL key to turn on and off Alarm Threshold Setting Range: Resistance: 1-199 ?? Current: 1-499mA Working Temperature and Humidity: -20 ?? to 55 ??; 10% RH to 90% RH LCD Display: 4 digit LCD digital display Display Size: Approx. 47 x 28.5mm / 1.85 x 1.12in(L x W) Jaw Size: Round jaw diameter Approx. 32mm / 1.26in Opening Size of Jaw: Long jaw Approx. 32mm / 1.26in Clamp Size: Long jaw Approx. 260 x 90 x 56mm / 10.24 x 3.54 x 2.2in Protection Level: Double insulation Structural Features: Clamp shaped CT Gear Shifting: Fully automatic shifting External Magnetic Field and Electric Field: Less than 40A/m; Less than 1V/m Single Measurement Time: 0.5 seconds Resistance Measurement Frequency: Greater than 1KHz Tested Current Frequency: 50 60Hz automatic. Package List: 1 x Tester 1 x Accessory 1 x Manual 1 x Storage Box