Feature: Made of premium materials, it is sturdy, wear-resistant and can be used for a long time. This type of resistance meter can self-test within 0.5 seconds and start up immediately, which is easy to use. The resistance range is 0.01-200Ω, and the measurement accuracy is high and the rate is fast. With warning light, the beep and NOISE symbols flash, and the anti-interference ability is strong. Low power consumption, long battery life and long life. With fastening screws, it is safe, and it is easy to replace the battery. Specifications: Material: Plastic Function: ground resistance test, loop resistance test Power: 4 x 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 Alarm threshold setting range: 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 x 28.5mm / 1.9 x 1.1in Fixture diameter: Approx. 32mm / 1.3in Clamp opening range: 32mm Weight: Approx. 2271g / 80.1oz Size: Approx. 260 x 95 x 68mm/10.2 x 3.7 x 2.7in Protecting level: double insulation Structural features: clamping CT Shift: automatic shifting External magnetic field: <40A / m External electric field: <1V / m Single measurement time: 0.5 seconds Resistance measurement frequency: > 1KHz 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 x Clamp Resistance Meter (Battery not included) 1 x Aluminum Box 1 x Instruction Manual 1 x Test Ring .