I have a question. I have just bought a wearlink coded transmitter. I thought I would have to do something to tune it into my monitor but from the instructions, it seems not. What I don't understand then is how the transmitter knows which is my monitor - if someone beside me was wearing a transmitter too, couldn't our monitors pick up the other's heart rate instead? So, I would have his heart rate on my monitor and he'd have mine on his? This no doubt shows a gross lack of understanding of the technology behind it but I am confused and wondered if anyone knew the (not too technical) answer.