Feature:1. High Accuray: True effective value measurement, more accurate readings, it can detect 3 sets of data per second, high measurement accuracy and rapid response2. Large Display: Clear imaging, easy to read and record, equipped with backlight function, easy to use in dark environments3. Reading Hold Function: It can keep the current measurement value, convenient for recording and reading4. Automatic Shutdown: When the meter is not used for a period of time, the meter automatically shuts down to save power5. Good Quality: Made of high quality ABS, drop proof, wear resistant and durable with long service lifeSpecification:Item Type: Clamp MeterModel: FC-21Material: ABSBattery: 2 x 1.5V AAA(battery not included)Purpose: electrical parameter measurementBasic Parameters:Jaw Opening: 25mm / 0.98inDisplay: 4000 digit back light displayMeasurement Speed: 3 per secondAutomatic Shutdown: after about 15 minutesAC Current Bandwidth: 50Hz~400HzAC Response: true effective valueOperating Conditions: 0~30 (32~86) 90%RH30~40 (86~104) 75%RH40~50 (104~122) 45%RH-30~60 (-14~140); <90%RHOperating Height: Operate below 3000MFunctionRangeResolutionAccuracyAC Current(50~400Hz)40.00A0.01A(2.8%+15digits)300.0A0.1A(3.0%+15digits)Non Contact Measurement AC Voltage 200VAC~1000VAC, 50/60HzFor Non sinusoidal waveforms, the frequency range is: 50Hz~60Hz; Overload Protection: 300A AC.Package List:1 x Clamp Meter(battery not included)1 x Manual1 x Lanyard1 x Storage Bag