Description :The current sensor model : ACS712ELC5v power supply, Onboard power light indicatorModule can measure +5 or -5 current, corresponding to the analog output of 185 mv/AWhen no current through the test, the output voltage is the VCC/ 2Size of the PCB board : 31 x13 (mm) (mm)Note: ACS712 is based on the detection principle of the hall, please try to avoid magnetic effectwhen using.Package included :5 xACS712ELC current sensor