1Universal gauge set is perfectly suitable for most of 12V 4/6/8 cylinder and gasoline car, boat, truck, etc. 2This gauge kit includes mechanical oil pressure/water temperature gauge, electrical volt meter and tachometer. 3Black dial with red pointer, strong contrast, easy to read, clear digital scale, high measurement accuracy. 4The dial is equipped with blue backlight, making reading at night more convenient and getting the information more easily. 5Sensor with high sensitivity, the gauge is easy to operate and install, perfectly match, greatly save your valuable time.