The Blue Sea 9630-BSS AC Ammeter, 0 to 50A with Coil supports accurate monitoring or measurement of an onboard electrical system.Meter senses and powers from coil slipped over wire to be measured; Simple 2-wire connection.Product Information Manufacturer Part Number 9630-BSS Key Features Meter senses and powers from coil slipped over wire to be measured Simple 2-wire connection Backlit meter face Backlit meter face (separate 12 or 24V DC backlight connections) Meter senses and powers from shunt connection Simple 4-wire connection from shunt Specifications Meter Current / Current / Current / Current Backlighting Amperage 16mA @ 12V DC, 20mA @ 24V DC / 16mA @ 12V DC, 20mA @ 24V DC / 16mA @ 12V DC, 20mA @ 24V DC / 16mA @ 12V DC, 20mA @ 24V DC Included Includes AC current transformer Includes DC shunt Important InformationWARNING: 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.