I was just looking for speed, trip, and odo. This seems to be fine, but was surprised by how small it is. Installs easily, took me about 15 minutes. Happy with my purchase considering the price. 4 stars

I picked up the CatEye CC-VL510 from REI, and strangely the case is different than what is pictured here. It looks just like the Velo 8. I'm not sure if mine is an older or newer version of the same model, but I like the look MUCH better than what is pictured here. (Either way, the functions, documentation, and the mounting kit are identical to those pictured here.) The installation is easy and requires no tools. It took me about ten minutes, but if you've installed one a bike computer before you could probably do it in 2-3 minutes. The documentation is a visual guide, not a written guide. I would have preferred a combination of written and visual instructions, but once you get your head around how it works you don't need instructions at all. My main concern was mounting it on a mountain bike (with a front shock), and that was no problem at all. The thing works like a charm, and the one touch operation is painless. (Holding down the button for 2 seconds acts as a 2nd button in situations where one isn't enough.) More than worth the $20 bucks in my opinion. 5 stars

Easy to use, works great, inexpensive, quick to install. I went back to wired unit because of expense and simplicity. Also one battery not two. 5 stars

I got the product in great time, the instructions were well writen and easy to understand. It was on my bike and working in an hour, np..good product for the biker that has no idea how far a day they ride,lol. 4 stars

Functions as a odometer, speedometer, trip meter and clock. It also shows maximum speed. In other words, all the basic functions you need.

The device works by counting the number of times a magnet attached to a spoke of the wheel passes a probe. This is converted into speed and distance with the aid of the diameter of the wheel. The diameter can be specified in centimeters.

Instructions were a little stretchy. It took me a while to figure out how to change the mode from km/h to mph and set the diameter of the wheels. A helpful chart is provided in the instruction to convert the specification of your bike tire to centimeter.

Once the device was installed and programmed, everything worked as expected.
5 stars