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[​>-​lightweight Design] Weighing only 22g, the screenless body design fits comfortably on the wrist, enhancing data accuracy without compromising comfort. [Advanced Sleep Monitoring] Monitor 4 sleep stages, analyze duration, deep sleep ratio, and light sleep continuity for improved sleep quality. [Long Battery Life] Enjoy up to 40 days of standby time with efficient low power consumption, ensuring continuous health management without frequent charging. [Waterproof & Versatile] With a 10m waterproof rating, this smart bracelet is perfect for swimming, diving, surfing, and daily activities like rain showers and bathing. [Automatic Fitness Tracking] The smart bracelet records running tracks and fitness data through the app, helping improve exercise efficiency with tailored insights. Spec: Item Type: Smart bracelet Material: Nylon+Plastic Key: Single Key Battery Capacity: 150mAh, Li Battery (built in battery for shipping) Waterproofing Level: 10m Waterproofing Charging Time: 2 hours Standby Time: 45-60 days General Usage Time: 20-30 days Charging Method: Magnetic suction CPU Model: for Realtek 8762ESFBluetooth Version BT5.0 Package List: 1 x Smart Bracelet 1 x Charging Cable 1 x User Manual How To Use: Refer to the user manual Note: