Meet the TalkBand B2: a smart tracker that pairs with your smartphone to offer activity tracking, sleep monitoring, and hands-free calling. Its touch-and-swipe user interface keeps you informed on the go. You can keep up with reminders, notifications, and stats on your wrist.
The device features a 6-axis motion sensor to determine which sort of exercise you are doing. It also measures your sleep quality. You can use it to find or unlock your phone easily. More information is available here.