Meet the Lenovo Vibe Band VB10: an E-ink fitness band that weighs just around 30 grams and monitors your steps, calories, travel distance, and sleep quality. Since it has an e-paper display, you will be able to get up to 7 days of battery on a single charge. The device will also support notifications from your smartphone. It will be waterproof as well. The device will cost $89 at this time.