Listen for the Shift, with the Schaffer Audio Tach
The one time every engine seems to run quiet is when you're trying to listen for the shift. It doesn't matter how noisy it runs normally, when you need to hear the engine RPM change, all of a sudden it purrs.
That's why we came up with the Schaffer Audio Tach; a small, inexpensive way for you to hear even the smallest changes in engine speed.
Just plug the Audio Tach into the car's cigarette lighter. That's all there is to it. In seconds, you can hear changes as small as a few RPM. That's because the Audio Tach creates a whining noise that varies with the alternator output. The faster the engine RPM, the faster the alternator turns, so the higher its output.
It's that simple. And because it's that simple, the Audio Tach works with any car with a working cigarette lighter and alternator. That's it...no fancy adapters...no special tools. Just a working lighter and alternator, and in seconds you can be listening to minute changes in engine RPM.
So stop straining to listen for shifts: Order your Audio Tach today!
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