Description: Timing Adjust: Properly adjusted timing, in turn,helps to make sure your engine works at power and efficiency. Ergonomic: Handle pistol-type design conforms to the engineering design, the button is comfortable, feels good, facilitates the operation. Universal: Adapts to all kinds of 12V battery for automobiles, motorcycles, personal watercraft, RVs, boats, airplanes, golf carts, lawn mower, etc . Material: High strength, impact resistance ABS shell, the chuck can be changed. Digital Display: Digital display button operation panel, simple and easy to operate Specification: Type: Ignition Timing Light Material: ABS Color: As Picture Size(L*W*H): About 29x26x9cm/11.42x10.24x3.54inches Voltage: 12V Operating Temperature:-20~60 Guide: Accurate ignition timing lights are necessary to get the best fuel economy and performance from ignition engines, and your timing provides a convenient way to use engine timing in todays cars. Advanced timing and other auxiliary functions, allowing the user to check the vacuum, mechanical or computer controlled timing curve! Usually, the engine needs to be adjusted or checked by a specific vacuum with a vacuum pick suitable for distributor or engine mounted in a car, at a specific engine speed or in some cases. Plastic timing can be used in 6 volt or 12 volt positive or negative grounding systems. 12 volt positive grounding system: 1. The timing, etc., red test is sandwiched between the positive terminal of the 12-volt battery. 2. The black of the timing lamp is connected to the negative terminal of the 12 volt electron. 3. Use a jumper wire (minimum 18AWG in seconds) 4. The black clip is connected to the negative battery terminal. 5. Connect the red clamp to a safe engine ground wire, e.g. alternator bracket/engine body. For safety reasons, do not use positive battery terminals or fuel system components as connection points. Timing engine preparation: It is important to follow carefully the instructions on the vehicle exhaust control label under the hood in order to make the engine basically correct.Common locations are the lower part of the hood, the leaf panel, the inner part of the valve hood or the hood lock.If the label is missing, refer to the appropriate vehicle maintenance manual or engine maintenance literature under the appropriate test.Note that the preparation process varies from engine to engine. Note that the following procedure is known to be used to connect the ignition plug sensor (direct fitting or induction clip type) to the No. 1 ignition plug. This process works for most cars today.But some engines use "average" timing, the most commonly used one used on smaller four-cylinder engines since 1982. Your timing lamp has an "average timing" capability.The only change in the assembly process is that the ignition plug sensor is not connected to the No. 1 ignition plug, but to the coil stanchion, i.e. the ignition coil in minutes per millimetre per year is connected to the center of the distributor cap.Consult your car radio manual for the exact procedure. Package includes: 1pc x Ignition Timing Light Note: 1. Due to the light and screen difference, the items color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement.