The ACM100 is a device that monitors AC power sources and outputs information about these sources onto the industry standard NMEA 2000 marine data network. ACM100 output information is then displayed with networked NMEA 2000 equipment such as the Maretron DSM Series dedicated displays or with NMEA 2000 compatible software such as Maretron N2KView.• Dimensions: 3.50" x 4.20" x 2.03" (88.9mm x 106.7mm x 51.6mm)• Weight: 13 oz. (368.5 g)• Operating Voltage: 9 to 32 Volts • Reverse Battery Protection: Yes• Load Dump Protection: Yes +/- 1 Percent Voltage & Current Accuracy 3-1/2 Inch Depth x 2.03 inch Height With 100 Ampere AC Current Transducer (With 1.5 Meter Cable), Four Stainless Steel Mounting Screws, User Manual | Maretron Alternating Current Monitor