Going beyond speed and distance to provide insight into the running stride itself, the s3 stride sensor is a durable light-weight module that measures just 55 x 39 x 14mm.

It can be mounted securely and unobtrusively to training shoe laces or placed inside the specially designed mid-sole cavity in the adidas Fusion running shoe.

The s3 stride sensor is activated automatically by the RS800CX wrist unit at the beginning of a training session and transmits speed, distance and cadence data to the RS800CX wrist unit using Polar W.I.N.D. 2.4GHz wireless transmission technology.

The s3 stride sensor has user changeable battery with a minimum lifetime of 50 hours during normal use. Remaining battery life can be checked remotely with the Polar ProTrainer 5™ PC software. Low battery warnings will also be displayed on the RS800CX wrist unit.

Polar s3 stride sensor is the most effective technology for tracking realtime pace, distance and cadence.

It features nano technology for highly consistent and accurate speed/pace and distance measurement and cadence data. User replaceable battery, excellent water resistance. Compatible with the Polar RS800CX. Also fully compatible with the adiStar Fusion running shoe!

• Compatible with the Polar RS800/RS800CX
• Measures your speed, distance & stride
• Extremely light weight and small
• Replaceable battery
• Simple to attach to your foot