Micro Ammeter. Simple 2-wire connection. Meter senses and powers from coil slipped over wire to be measured. Includes AC current transformer. Backlit meter face. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.