Detecting of AC current, phase, power energy, power, and power factor, harmonic etc. Apply to oscilloscope, harmonic analyzer, Power fault analyzer and other industrial control devices 1. Model No.: ETCR040A 2. Range :0.00A~500A 3. Turn Ratio/Output Voltage : 4000:1 /0~3V(20Ω) 4. Resolution : 0.01A 5. Accuracy Class :0.5 6. Clamp Size :35mm×40mm