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[Sleep ing Function] Monitor deep sleep, light sleep, and awake times automatically while wearing the smart bracelet to bed. [Versatile Additional Features] Enjoy a stopwatch, countdown timer, alarm clock, and raise to wake screen for everyday use. [Skin Friendly Design] Made from safe silicone, this bracelet is comfortable for both men and women without requiring ​ connectivity. [Continuous Body Data ing] Keep of your steps, calories burned, and distance in real time for motivation during exercise. [Long Battery Life] Equipped with a 50mah battery and usb charging, enjoy several days of usage on a single charge with up to 45 days of standby time. Spec: Item Type: Smart Bracelet Material: Silicone, ABS Battery: 50mAh li battery (shipped with built in battery) Standby Time: 45 days Package List: 1 x Smart Bracelet 1 x Charging Cable 1 x User Manual How To Use: Turn on the power to start using it.