HalfwaterHalfgas Perhaps it would be useful to have a separate forum for these goofy "the big oil companies pray that you don't find out about this" products. This one only asks that you pay him $67 for a book on how to build your own.
Let's keep stuff like this in Fred's...it's certainly not something that should be posted as "News" on the Home page.
They do nothing, something that works, not so much in a Prius, but in other cars is an accelerometer, if you keep your starts and stops slow and long, you will save gas, this measures how fast you do each.
