Not an answer to your question but : are you aware that the Zone does not sync with micoach.com like the pacer ? You're missing out on all the training programs, coaching during the run and review of data afterwards. Zone only helps you to see where you are during the run.
I would not be surprised if it is discontinued, since in terms of features it is really no competition to all the other HRM out there, adidas or other. And if you want just a simple HRM then there are many cheaper options (I used one of 20 Euro for some time)
