Blue Sea Systems Product no. 8236 DC Digital Ammeter Displays amperage from -500 to +500 Amps 3 levels of display brightness Splashproof front Manual sleep mode blanks display for power conservation Standard meter operates in negative side of circuit only. Shunt Shifter required for positive side installation such as alternators Includes 500 Amp shunt Applicable for 12, 24, 32, 36, and 42 Volt DC systems Weight Lb (Kg): 1.12 (0.51)