This current clamp adapter allows you to measure current without breaking the circuit, which should be attached to general meters for work.Features:Measuring Range: 600A DC/AC current.Can measure the current of meter and the current waveforms of oscilloscope.Clamp design and only two buttons, easy to operate.Jaw opening of 45mm to measure current without touching or interrupting the circuit.Comes with test probes for convenient measurement.Includes LED low power indication.Suitable for general meters.Specifications:Model:hp-605aColor: Grey + BlueMaterial: ABSJaw Opening: 45mm*Measuring Range:DC Current: 600AAC Current: 600ASignal Output: 1mV/1AOutput Impedance: 10KConversion Accuracy: ±(2.5%rdg+5dgt)Power Supply: 1 * 9V 6F22 Battery(NOT Included)Weight: Approx.327g/11.5ozPackage list:1 x Clamp Adapter with Test Probes(Battery NOT Included)1 x User Manual(English)Note:It should be attached to general meter for work..