Designed to withstand constant vibration and the rigors of a wet marine or dusty outback environment. Displays data on a bright, waterproof, daylight readable OLED (Organic LED) screen. High contrast and resolution make this screen visible from a wide viewing angle, even with polarized sunglasses. Reverse polarity protected. Same compact round size as a standard 12V receptacle, this OLED meter provides many installation options. Injection molded nylon construction. IP66 rating. Includes 100A/50mv shunt. 100 Amp range. A 1-7/16" B 3/4" C 1-1/8" Volts 12-24 Description Amp Meter