That Mi line of products is pretty crazy. You might think this is the latest in a long line of jaw-droppingly inexpensive devices, and you’d be wrong. It’s at least the second-latest.
Like its forerunner the Mi Band, the 1S is compatible with both Android and iOS. It tracks heart rate, counts calories and steps, monitors your sleep, and will survive for up to half an hour under a meter of water if you try to drown it. All at a fraction the price of its similar competitors.
Pre-sale has begun and you may order it from multiple websites. I ordered 2 on gearbest