Features:Added automatic detection function.Adopt PIC16C622A microcontroller.No battery needed, power supplied directly from the ignition.Black-negative, Red-Positive and White-Signal.Using high-brightness LED digital tube.Suitable for DLE series / MT gasoline engines, etc.Specification:Condition: 100% Brand NewItem Type: RC AccessoryMaterial: PCBColor: BlackSize: Approx. 54 x 20 x 15mm / 2.13 x 0.79 x 0.59inchDisplay Screen Size: Approx. 32 x 15mm / 1.26 x 0.59inchWeight: Approx. 22gInput Voltage Range: 3-12VCurrent Consumption: 25mA-60mAMaximum RPM: 30000RPMActual RPM=Display Digital * 10Package list:1 x Ignition Tachometer1 x Manual.Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.