Ditch the chest strap and run for longer with the SF-810 Epson’s Runsense SF-810, the latest product in its range of Runsense sport monitors, is now available to buy. The exciting new model uniquely combines a GPS tracker, Smart Stride sensor and heart rate sensor, allowing users to benefit and learn more from every run. Incorporating a wealth of technological … [Read more...] about Epson’s Runsense GPS sports monitor with built-in optical heart rate sensor technology available now