ANENG ST181 4000 Counts Digital AC Current Clamp Meter 400A Automatic Range Multimeter with Backlight Voltage Meter Clamp Gauge NCV Test Clamp Ammeter Universal Meter Tester Measuring Capacitance/ Diode / AC Current / AC/DC Voltage / Resistance / Frequenc Features: - Compact Size: Portable to carry and easy e in one hand. - 36mm Jaw Opening: 36mm large jaw opening to measure without touching or interrupting the circuit. - Automatic Range: Intelligent efficient operation to get scientific accurate results. - 400A AC Current Measurement: 40A~400A±(2.5%+3) wide range measurement, suitable for various wires, convenient & accurate. - NCV Non-contact Voltage Detection: If you want to detect whether there is AC voltage or electromagnetic field in the space, you can get the front end of the clamp head of the meter close to the measured object. If there is, a beep will sound and the NCV light will flash. - Data Hold Function: Hold the measured data for conveniently checking or observing data. - Backlight Function: LCD screen with backlight for clear data display. - Low Voltage Prompt: When the low power symbol appears, it is necessary to replace the battery in time. Insufficient power may affect the accuracy of the measurement results. - Automatic Shutdown: If there is no operation within 15 minutes, the meter will shut down automatically. - Equipped Accessories: Comes with one pair of test probes for convenient measurements. The black pouch with zipper is for convenient storing and carrying. - Multifunctional Measurement: AC / DC voltage, AC current, resistance, capacitance, frequency, NCV test, diode, on-off test. Specifications: Product Material: ABS Line Material: Brass+PVC Color: Black Power Supply: 2 * AAA Battery (NOT included) Automatic Shutdown: After 15 minutes Display: LCD display Maximum Count: 4000 counts Jaw Opening: 36mm DC Voltage Range: 400mV±(1.5%+5), 4V~600V±(1.0%+3) AC Voltage Range: 4V~600V±(1.5%+3) AC Current Range: 40A~400A±(2.5%+3)  Frequency Range: 10Hz-400kHz±(1.0%+5), 400kHz-4MHz±(2.0%+5) Resistance Range: 400Ω±(1.2%+3), 4kΩ~40MΩ±(1.5%+5) Capacitance Range: 1nF~4μF±(2.5%+10), 4μF~400μF±(4.0%+20), 4mF±(5.0%+30) Diode: √ Zero/Fire Line Identification: √ NCV Test: √ On-off Beep: √ Backlight: √ Data Hold: √ Item Size: Approx. 183.3*48.8*33mm / 7.22*1.92*1.3in Item Weight: Approx. 128.7g / 4.54oz Package Size: Approx. 23.5*10*4cm / 9.25*3.94*1.57in Package Weight: Approx. 274g / 9.67oz Note: Please read the Users Manual before use. Packing List: 1 * Clamp Meter 1 * Pair of Test Leads 1 * Storage Bag 1 * Users Manual(English)