Deftor Universal Black 2" 52mm Digital LED Tacho Tachometer Gauge 0-9999 RPM for Car Motorcycle Power: Professional 12V,IGN MAX 0.3A Warning Light: Exceed 5000 RPM Suitable For: All car model Blue Digital LED Display This model will precisely measure the engine and crankshaft revolutions per minute of your engine that is between 0  9,999 RPM. This series is fully electronic with a blue digital LED readout, which allows for easy viewing at all angles during all lighting conditions. A tacho adapter may be required if you have a multiple coil ignition system to ensure a proper signal.