Features: - Compact Size: Portable to carry and easy to use in one hand. - 36mm Jaw Opening: 36mm large jaw opening to measure without touching or interrupting circuit. - Automatic : Intelligent efficient operation to get scientific accurate results. - 400A AC Current Measurement: 40A~400A±(2.5%+3) wide measurement, suitable for various wires, convenient & accurate. - NCV Non- Voltage Detection: If you want to detect whether there is AC voltage or electromagnetic field in space, you can get front end of clamp head of meter close to measured object. If there is, a beep will sound and NCV light will flash. - Data Hold Function: Hold measured data for conveniently checking or observing data. - Backlight Function: LCD screen with backlight for clear data display. - Low Voltage Prompt: When low power appears, it is necessary to replace battery in time. Insufficient power may affect accuracy of measurement results. - Automatic Shutdown: If there is no operation within 15 minutes, meter will shut down automatically. - Equipped Accessories: Comes with one pair of test probes for convenient measurements. 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 : 400mV±(1.5%+5), 4V~600V±(1.0%+3) AC Voltage : 4V~600V±(1.5%+3) AC Current : 40A~400A±(2.5%+3) Frequency : 10Hz-400kHz±(1.0%+5), 400kHz-4MHz±(2.0%+5) Resistance : 400Ω±(1.2%+3), 4kΩ~40MΩ±(1.5%+5) Capacitance : 1nF~4μF±(2.5%+10), 4μF~400μF±(4.0%+20), 4mF±(5.0%+30) Diode: √ /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 Users Manual before use. Packing List: 1 * Clamp Meter 1 * Pair of Test Leads 1 * Storage Bag 1 * Users Manual(English) - Compact Size: Portable to carry and easy to use in one hand. - 36mm Jaw Opening: 36mm large jaw opening to measure without touching or interrupting circuit. - Automatic : Intelligent efficient operation to get scientific accurate results. - 400A AC Current Measurement: 40A~400A±(2.5%+3) wide measurement, suitable for various wires, convenient & accurate. - NCV Non- Voltage Detection: If you want to detect whether there is AC voltage or electromagnetic field in space, you can get front end of clamp head of meter close to measured object. If there is, a beep will sound and NCV light will flash.