You get what you pay for.
The LED display didn't work very well and the actual settings steps did not correspond to the instructions. I finally just gave up and tossed the device in a box. I'd return it, but since it wasn't very expensive, at all, and the hassle of repackaging and taking it the post office, and contacting the vendor, etc. are all sufficient enough a deterrent to cause me to just consider this a bad purchase. I should have purchased one locally from a Bike shop, so that I could have just more easily taken it back in for an exchange or refund. This was one of those "You get what you pay for" bargains...I paid next to nothing and that's what I received in return. Lesson learned.