The FitBit Flex 2 Fitness Wristband encourages you to regularly exercise with gentle activity reminders, 24/7 activity tracking, and multi-sport functionality. Streamlined compared to standard activity trackers, the Flex 2 blends into your daily routine with its lightweight, ultra-thin design. The tiny fitness tracker pops out of its wristband, providing the ability to customize the look of the Flex 2 with dressy bangles, upscale pendants, and colorful accessory bands (all sold separately). FitBit includes a small and large wristband to fit virtually any wearer. Activity tracking monitors your steps taken, distance walked, and calories burned, as well as active minutes, hourly activity, and stationary time. Automatic sleep tracking gives you a better picture of your nightly rest, with a silent alarm to peacefully wake you up in the morning. Multi-sport functionality supports runners, swimmers, and cardio at the gym, giving you the ability to monitor your exercise stats on the FitBit app. Because it's fully submersible, you can lap the pool, take showers, and hit the beach without damaging the tracker. The LED display lights up to alert you of incoming calls and text messages, and also provides reminders to get you moving after sitting for hours. It wirelessly syncs with a wide variety of Bluetooth-enabled devices, so you sync your exercise data with FitBit's mobile app. When it's time to recharge the Flex 2 tracker, simply plug it in for as little as two hours for a fully powered device. The battery lasts up to five days, so you don't have to charge it every night.