0.01 to 1200Ω 0‑20A Clamp Ground Resistance Meter LCD Display Multifunctional High Accuracy Resistance Current Meter 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 Ω to 1200 Ω Current Range: 0-20A Current Resolution: 0.05ma Resistance Resolution: 0.001 Ω 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 Ω 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