Just like the RS800, the RS800sd has all the same advanced features to help you plan, monitor and analyze your training. However, what makes it different is the additional s3 Stride Sensor. This essential piece of kit provides you with information about how to improve your running technique. After all, in competitive situations, shorter or faster strides can have a dramatic impact on your performance.
At the heart of your training lies the RS800CX wrist unit. With the ability to record a wide range of performance details, the unit works with the WearLink®+ transmitter W.I.N.D. to provide you with the most accurate measurement of your heart rate. This kit at the most basic level is compatible with all W.I.N.D. sensors, so you can create and build on your training system to keep up with all your training challenges - now and in the future.