Inside the clamp ammeter, a integrated circuit is used, and an insulating rod is used to measure the current of a high voltage line with insulation sheath below 60 kV or bare wire below 35 kV . When not using the insulation rod, it can also be used as a high-precision low-voltage clamp ammeter, leakage current meter, can accurately split out the current or leakage current of 0.1mA. It is easy to use and carry. Equipped with telescopic insulation rod, it is easy to carry and use.