Two of my three wireless computers were Cateye's, a Micro and a Wireless 2, both lasted an average of 4 years, both the sending units failed. Cateye had wonderful customer service for the Wireless 2, they sent me another sending unit for free a year AFTER the warranty expired, but two years later the replacement failed. But due to their outstanding customer service I thought I would try them again and got the Micro, that one lasted 3 years and the sending unit died last month. I gave up on Cateye computers and any wireless now, I went with the Sigma BC1609 wired.