I bought a bike and this came with it. I am not sure that the power part works; it displayed zero for power when I used it. The lights on the power sensor light up but I didn’t get a reading, and since I already have a Powertap wheel, I didn’t have much motivation to try to make it work. So I am selling this as-is. There’s the power thingy, a WIND speed sensor (that must work; I did see a speed on there), the little case for the CS600, the CS600, a mount, etc (everything in the picture). $50 shipped, and for another $20 I will throw in a USB infrared adapter with a driver disc that’s never been used (see the second blurry picture below).