Features:  Ultra-portable tools for advanced electricians. AC DC power can be tested quickly, accurately and safely without damaging the insulation on the line surface.  Clamping meters a True-RMS features and 1mA resolution. At the double impedance test voltage. Can respond effectively to the needs of professionals.  NCV measurement, the gear position is adjusted to the NCV, when the non-contact voltage sensing area is close to the circuit to detect the AC voltage, the clamp meter will display the buzzer alarm sound of different frequencies according to the detected voltage intensity.  Maximum display: 5999. Compared to similar products, has a precision of 1mA for a larger measuring range (0.1 ~ 600A).  Large jaw design, the jaws of the clamp meter can be opened 27mm for a variety of wire measurements.  LCD display, clear reading, backlit function, clear reading in dark environments.  Flashlight illumination for easy measurement in dark environments.     Specification:  NCV measurement: Yes;  True RMS: Yes;  Backlit display: Yes;  On-off alarm: Yes;  Diode measurement: Yes;  Numerical lock: Yes;  Low voltage display: Yes;  Auto power off: about 15 minutes;  Measurement method: double integral A/D conversion;  Jaw opening: 27mm;  Power: 2*AAA battery (not included);  Size: 176x67x33mm/6.9"x2.6"x1.3".     Package included:  1 x Clamp Meter;  1 x Meter Pen;  1 x Temperature Thermocouple;  1 x Carrying Bag;  1 x User Manual.