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: Red- Material: Plastic, Electronic Parts- Size: 15 x 7 x 3cm / 5.9 x 2.8 x 1.2inch(LxWxH)- Product Name: Clamp ammeters- DC Voltage: 600V, ±1.0%- AC Voltage: 450V, ±1.2% - AC Current: 20-200-400A, ±2.0% - Resistance(ohm): 200KΩ, ±1.0%- Buzzer Function: Yes- Max LCD display: Yes- Data Hold Function: Yes- Max Display: 1999- Battery Type: 2 x 1.5V (AAA Battery) (Not Included)- Weight: Approx. 115g- Cable length: Approx. 0.7M- Digital multimeter with plastic holster.- 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.- On-off warning and diode testing functions.- Low battery indication.- Function of overload protection.Packing list: 1 x Clamp Digital Multimeter 1 x Test leads 1 x User Manual