I have bought this chest for training on a Sport Plus Speed Racer SP-SRP-3000, because the hand sensors are inaccurate and the existing Garmin Chest Strap from training computer is not recognized (coded?). The connection between the Sigma Belt and computer worked straight away. The Sigma-belt is used by me solely for that purpose, and operates very well with the restriction that the range is not very great, even with a new battery. If, for. B. times takes his hands off the handlebars to sit upright for a relaxation phase, the computer loses sproadisch the signal. But once you resume normal stooped posture while gripping the handlebar occupies (smaller distance belt - Computer), the signal is again properly. A small drawback, which can be taken in my opinion into account. A little tip: moisten before training the contact surfaces of the chest strap with water so that the same arises good contact for even dry skin surface. With increasing Trainigsdauer or intensity which then takes over the welding :).
