Clamp Ground Resistant Meter Digital Display Anti Interference Ground Earth Resistance Tester Item Type: Clamp Ground Resistant Meter Mode: ST4800 Battery: 1.5V AA battery x 4 (without battery) Material: ABS Basic Parameters: Function: Grounding resistance test, circuit resistance test, leakage current test Environmental Temperature and Humidity: 23 ℃± 5 ℃, below 75% rh Measurement Method: Mutual inductance method Resistance Resolution: 0.001 Ω Current Resolution: 0.01mA Jaw Size: Approx. 55 x 32mm / 2.17 x 1.26in Clock Function: Yes Ω and A Synchronous Display: Ω and A displayed on the same screen Display Mode: 4 digit LCD display, black screen design LCD Size: Approx. 46 x 36mm / 1.81 x 1.42in Measurement Time: 1 time/second Data Storage: 500 sets, with a "MEM" storage indicator and a flashing "MEM" indicating that the storage is full. Data Lookup: When querying data, the "MR" indicates Overflow Display: When the overflow exceeds the range, the "OL" indicates Interference Test: Automatically identify interference signals, and indicate with the "NOISE" when the interference current is high Alarm Function: Issue an alarm prompt when the measured value exceeds the alarm setting value Battery Voltage: Real time display of battery level Automatic Shutdown: Set to 5, 10, 15, 20 minutes, or OFF. OFF means to cancel the automatic shutdown, and the default is 5 minutes.