Another thing to consider is how well it sticks. I find the adhesive *really* strong at first, but then at around 10-11 days, it starts coming loose and has on the last two occasions fallen out at day 11. I ordered an armband from a guy on ebay, it has a lightweight adjustable elastic, and a circular holder designed to prevent the sensor from falling out. I am at Day 11 now, and theres no sign of the sensor failing. Very happy that I went with that, instead of anything sticky. I’ll probably get another just as a backup.Thanks! I’m going to give it another try today. I’m limited to the use of one arm because I am a breast cancer survivor.