Of course you can devices for measuring heart rate in other luxury - get variants and higher selling prices. However, this transmitter from Polar is completely sufficient for normal use. According to the manufacturer it is thus even can go swimming. The manufacturer's warranty period is 2 years from the date of purchase. Inside my apartment, the range of the transmitter was about 4 m to the receiving device. The handling of the transmitter is relatively simple, the belt must be easily created below the chest and slightly moistened with water. Everything else controls the transmitter to the corresponding receiver (with me an ergometer) all by itself. Negative noticed that the belt in the sporting movement slip sometimes easy (since you might need a little polish to the system, the horizontal fixation of transmitter possible way does not seem to be enough). What is also missing is information on whether the transmitter is powered by battery, and if so, how long is the life of this battery. If a battery would be necessary, I do not desert, at which point they could be replaced (ie, either one would have to return the unit to the manufacturer or give to a special). It would be nice if the manufacturer could add this information to the product description.
Conclusion: The Polar T31 Set is an inexpensive and useful instrument for determining the heart rate. With regard to some hardware details, the producers could operate in a more transparent customer information.
