This is the original Misfit Shine 2 Swimmer’s Edition activity tracker. It’s like Fitbit, so it tracks steps and sleep and exercise automatically, but the battery lasts 6 months (no charging every few days) and it’s waterproof to 50m (you can swim and shower and even dive a little with it). It syncs over Bluetooth to your iPhone or Android phone (Samsung, LG, Sony, Huawei, HTC, Lenovo, etc…) and can show the time, vibrate when you get a phone call or SMS, and be used to control music on your phone or as a button to take a photo with your phone.
I wore it for one month, so it has light usage marks but it’s still like new. It comes in its original box with all of the accessories: a white and a black band, a clasp, an action clip, and the battery removal tool.
This is the Swimmer’s Edition Shine 2, which costs $120 in the US.