The Oregon Scientific heart rate logger was just what I had been looking for. I already had a basic heart rate monitor, but sometimes I wanted to record my heart rate. When the unit arrived the green led came on, but I could not get it to link with my Polar T31 transmitter. I checked the CR2032 battery, and it measured 2.8 volts, a little low. So I replaced the battery, and it linked right up. I suspect the seller bought units that have been setting for a while. I have used the unit a couple of times and it works as advertised. The software is a little lame, the graphing could be better, but you can always load the data into an excel spreadsheet and make up your own graphs. I will downgrade it one star for having a low battery, but it's still a bargain at $13.88.Get more detail about Heart Rate Logger with Download.
