
I bought this transmitter because I did not know that the Polar Heart Rate Monitors came with a
buy transmitterincluded in the box. I could not find anything that specified this, so I ended up purchasing an extra transmitter. If your Polar wrist watch came with one of the old transmitters, you should seriously consider changing it for the Wearlink. One big improvement from the original transmitters (T31 or T61 transmitters) is that with this model (the Wearlink) you only have to buy a new battery and replace it once they ran out and your
buy transmitteris ready to use again. With the original ones you have to buy a new transmitter every time the battery dies, since the whole structure is sealed. So if your Polar wrist watch came with the T31 or T61, wait until the battery is finished and buy the Wearlink transmitter instead, you will save a lot of money over the years (compare the 39.95 US$ that the T31 or T61 cost vs the cost of a replacement battery).