Features: 1. The product comes with ten self-check modes, and the meter will automatically enter self-check when it is started after connection. 2. 7-in-1 instrument selection kit for voltmeter, water temperature meter, tachometer, vacuum meter, oil temperature meter, oil pressure meter, and turbine meter. 3. The instrument has extremely high sensitivity and unparalleled accuracy, and it will continuously switch colors during use to enhance the interior atmosphere. 4. The numbers and pointers are displayed clearly. The lighting on the dial facilitates reading in the dark. 5. Suitable for 12v cars and motorcycles, professional installation is highly recommended. Light color: 7 colors (switchable) Product specifications: Size: 2.5 inches (62 mm) Material: ABS plastic Suitable for various 4/6/8 cylinder engine cars Viewing angle: 270 degrees Audio self-test on startup Includes instrument rack Including sensors and wires Can be connected in series with multiple instruments Style: Multicolor on black Light color: 7 colors (switchable) Installation Precautions: 1.4 pin, power cord: Red, battery White-ACC + Yellow backlight+ Black battery-(automobile metal part) 2. Sensor and signal line: Red -< touch white Black -< black sensor Product List: 1*Product kit 1*English manual