Features MEASURING RANGE --- The clamp resistance tester uses microprocessor control, which can accurately detect ground resistance, with a measurement range of 0.01‑1200Ω. MULTIPLE FUNCTIONS --- Resistance and current display on the same screen, with real time clock, data storage, data retrieval, alarm, automatic shutdown and other functions. LESS INTERFERENCE --- Using fast filtering technology, which can minimize interference, achieve stable performance, high resolution, accurate and reliable operation. DISPLAY AND ALARM --- The resistance meter adopts a 4 digit LCD digital display, which is clear and intuitive, supports sound and light alarm, and fully automatic gear shifting. APPLICATIONS --- Suitable for measuring ground resistance in telecommunication, power, meteorology, computer room, distribution line, tower transmission line, gas station, factory grounding grid, and other fields. Specification: Item Type: Clamp Resistance Tester Model: ETCR2000+ Battery: 4 x 1.5V AA Battery (battery not included) Function: Ground resistance test, circuit resistance test, leakage current test Resistance Range: 0.01-1200Ω Resistance Resolution: 0.001Ω Data Storage: 99 Sets Audible and Visual Alarm: Beep alarm sound, press the AL key to turn on and off Alarm Threshold Setting Range: Resistance: 1-199Ω, Current: 1-499mA Working Temperature and Humidity: -20-55℃; 10%RH-90%RH LCD Display: 4 Digit LCD Digital Display Display Size: Approx. 47 x 28.5mm / 1.9 x 1.1in Clamp Jaw Size: Approx. 65 x 32mm / 2.6 x 1.3in Jaw Opening Size: Approx. 32mm / 1.3in Clamp Meter Size: Approx. 285 x 85 x 56mm / 11.2 x 3.3 x 2.2in Protection Level: Double Insulation Explosion Proof Sign: ExiaIIBT3Ga Structural Feature: Clamp Type CT Shift: Full Automatic Shift External Magnetic Field and Electric Field: <40A/m; <1V/m Single Measurement Time: 0.5 Seconds Resistance Measurement Frequency: >1KHz Package List:1 x Resistance Tester 1 x Accessory1 x User Manual1 x Storage Box Package List 1 x Resistance Tester 1 x Accessory 1 x User Manual 1 x Storage Box