Electronic

Wireless heart-rate monitor chest strap (and elastic band) - compatible with all equipment.   This is a chest strap which senses your heart-rate and transmits it wirelessly to any Polar-compatible (non-coded) device, such as treadmills and...

Add GPS-tracking functionality to your Polar FT60, FT80, or RS300x   Polar G1 GPS sensor provides speed, pace and distance measurement for outdoor sports, such as running or cycling. The G1 speed range is 0-199km/h / 0-123.6m/h. Compatible With ...