Specifications: Condition: 100% Brand New Material: Plastic Function: ground resistance test, loop resistance test Power: 4 * 6V DC Battery (Battery not included) Resistance range: 0.01-200Ω Resistance resolution: 0.001Ω Maximum resistance accuracy: ±1%±0.01Ω Data storage: 99 sets Resistance: 1-199Ω Alarm sound and light: "Beep-beep" alarm sound, the alarm symbol flashes, press the AL key to turn it on, turn off the alarm or set the alarm threshold. Interference signal recognition: "Beep-beep" sound, NOISE symbol flashes Working temperature: -20 ° C -55 ° C Humidity: 20% RH-90% RH LCD screen: 4-digit LCD display Screen size: Approx. 47*28.5mm / 1.9*1.1in Fixture diameter: Approx. 32mm / 1.3in Clamp opening range: 32mm Weight: Approx. 2271g / 80.1oz Size: Approx. 285*85*56mm / 11.2*3.3*2.2in Protection level: double insulation Structural features: clamping CT Shift: automatic shifting Measuring current frequency: 50 / 60Hz automatic measurement Low battery indicator: The battery low indicator is displayed when the battery voltage is lower than 5.3V Memory full indication: MEM symbol flashes when all 99 memory is full Overrange indication: Out of range indication "OLΩ", "L0.01" or "OL A" Auto power off: 5 minutes after startup Power consumption: 50mA at startup or normal operation, 30 hours of continuous operation Package list: 1 * Clamp Resistance Meter (Battery not included) 1 * Aluminum Box 1 * Instruction Manual 1 * Test Ring