I was a little concerned about the quality of this item based on its price but since the majority of the reviews seemed positive I decided to give it a try and that was a big mistake. This is probably the most poorly conceived bike computer ever designed. Rather than being held in place with screw tightened brackets everything is mounted with zip ties which seems like a good idea except that you cannot get them tight enough to hold everything in place, the readout unit slips down due to the normal vibration and the pickup unit needs constant adjustment in order to work. This will be going back in the morning and I will buy a decent Cat Eye, or Sigma computer like I should have done in the first place. I would not use this thing if they were giving them away free.