The ideal way to remember your heart rate monitor every time you are cycling is to have it in your cycle computer. Introducing, the SI 90 HR. A truly committed wireless cycle computer, coupled with a multi-function heart rate monitor, the SI 90 HR is designed to give the feedback required by the most discerning cyclists. With all the functionality on one large easy-to-read display and its intuitive user interface, the SI 90 HR is the premier cycle computer. That way, you can focus more on the challenge of the ride, not on the challenge of adjusting your cycle computer. Since everything is wireless, installation couldn’t be simpler and your bike remains clean and uncluttered.