Product details:

Specificaiton: Function:Ground resistance test, Loop resistance test Power Supply:6VDC 4 PCS of AA Alkaline batteries Resistance Range:0.01-1200 Resistance Resolution:0.001 Highest Resistance Accuracy:1%0.01 Current Range:0.00m - A-20.0A Current Resolution:0.05m - A Highest Current Accuracy:2.5%1m - A Data memory:99 Sets Alarm Threshold Setting Range:Resistance: 1-199 Alarm Sound and Light:"Beep-beep-beep" alarm tone, Alarm Symbol Flashing, Press AL key to turn on, turn off Alarm or set Alarm Threshold. Interference Signal Recognition: "Beep-beep-beep" tone, NOISE symbol blinking Working Temperature and Humidity:Working Temperature and Humidity LCD Screen:4 Digits LCD display, Screen LW: 47mm28.5mm Clamp Size:Clamp Size Clamp Opening Extent:32mm Tester Weight:1160g (With batteries) Clamp Dimension:LWT: 285mm85mm56mm Protection Level:Protection Level Structural Feature:Clamp CT Shifting:Automatic shifting External magnetic field:40A/m External electrical field:1V/m Single measurement time:0.5 second Resistance measurement frequency:1KHz Measured current frequency:50/60Hz Automatic measurement Low Battery Indication:Low battery symbol displays when battery is lower then 5.3V Memory Full Indication:MEM symbol blinks when all 99 sets memory is full Over Range Indication:Out of range indication "OL", "L0.01" or "OL A" Auto Power-off:5 minutes after Boot up