Feature:1. INTELLIGENT ACTIVITY TRACKING: Wear it close to your body to track every step of your movement, monitoring your activity in daily scenarios to calculate calorie consumption and distance, allowing for more effective workouts.2. MAGNETIC QUICK CHARGING: With strong magnetic performance, the device provides stable attachment and efficient charging. The rot resistant charging port enhances durability, ensuring a longer lifespan.3. WATER RESISTANT: Featuring a fully sealed construction process, this device achieves an IP67 water resistant rating, allowing you to wear it freely in various daily water related activities such as handwashing, showering, and swimming, easily meeting your waterresistant needs.4. LOW POWER CONSUMPTION STANDBY: Energy saving technology ensures that a single charge can continuously record for 23 days without interruptions. Compatible with for Android 5.0 and above/for iOS 10.0 and above, the app enables you to conveniently access your data at any time.5. LIGHTWEIGHT AND COMFORTABLE: With a thickness of 2.5mm and crafted from zinc alloy, this device weighs approximately 5 grams, offering a blend of minimalism and durability.Specification:Item Type: Smart RingMaterial: Zinc Alloy + ResinCompatibility: for Android 5.0 and above, for iOS 10.0 and aboveBluetooth: BLE 5.0Water Resistant Level: IP67Standby Time: 2-3 daysCharging Method: Magnetic ChargingApp: Da RingsBluetooth Distance: 3 ~ 5m / 9.8 ~ 16.4ftBattery Capacity: 20mAh, Lithium Battery (Built in Battery Included).Package List:1 x Smart Ring1 x Instruction Manual1 x Charging Cable