Have bought the chest after several recommendations for my Garmin 310XT Forunner because the original chest spat extremely high pulse rates in conjunction with the transmitter and actually was no longer viable. The Polar chest strap fits perfectly together with the station and had with me will not be "reworked" ... I had draufmachen only the transmitter and you're done. The transmission of values and the recognition by the Forerunner worked right away and without any settings. Now I've finally realistic pulse rates and at a price that allows the original chest can not keep up.