Description Clamp ammeters referred to as clamp meter. The work is mainly composed of an electromagnetic current meter and bushing type current mutual inductor. Straight through current core made of movable opening, and a clamp on ammeter, named. The utility model relates to a portable instrument which can directly measure the AC current of a circuit without disconnecting the circuit. Features - Color: Random color. - Material: Plastic. - Size: 15 x 6 x 2.8 cm. - DC voltage measurement range: 600V. - DC voltage measurement accuracy: ±1%. - AC voltage measurement range: 450V. - AC voltage measurement accuracy: ±1.2%. - AC current measurement range: 20-400A. - AC current measurement accuracy: ±2%. - Resistance measurement range: 200KΩ. - Resistance measurement accuracy: ±1%. - 3 1/2 LCD display, Max reading 1999. - Electric pool: 2 x AAA batteries (not including batteries). - Jaw diameter: 21.3 mm. - Low battery indicator function - Overload protection - Data retention is more convenient for reading - Buzzer on - off and diode test function - High sensitivity voltage and AC current measurement. - Fit for schools, factories, families, and amateur wireless lovers. - Mini and compact design, more convenient to carry and use. - Data hold and LCD display, easy and clear to read. Low battery indicator function Overload protection Data retention is more convenient for reading Buzzer on - off and diode test function High sensitivity voltage and AC current measurement.