$400, God, I prefer dying. Then I think it misses a On&#x2F;Off button on the sleeve, to make it compatible with automatic calls for emergency, and a speaker to beep, in case we forget to turn it off, and also it could detect car collisions with an accelerometer, ect... This is for fitness, there needs something oriented for health, and I think it could be cheaper, couldn&#x27;t it? It&#x27;d sell well, because then it has utility. Even if I bought this I&#x27;d still have to hack the software, it seems. But it&#x27;s interesting to know about.