Apachekid: no problem. Here's a bit more info as well. There are digital and analog wireless sensors and, from what I've read the analog computers are cheaper but more susceptible to interference. Also, on that strada unit I linked to, it's very directional. If the computer is not more or less above the sensor, it won't read, so you can't put the sensor on the rear wheel, for instance. That might also be what allows it to work so near my engine. I even have a tach/hours meter wire running right past it on the bars, as well as my kill switch wire.