【Advanced Health Monitoring】Equipped with heart rate, blood oxygen, and stress detection sensors for comprehensive health tracking. 【Multi-Sport Modes】Supports various exercise modes, perfect for tracking different types of workouts and activities. 【Waterproof Design】Rated for swimming and diving, allowing for worry-free use during water-based activities. 【Long Battery Life】Enjoy 3-5 days of usage on a single charge, with a quick 2-hour recharge time. 【Sleek Magnetic Charging】Features a convenient magnetic charging system for easy and secure power replenishment. 【Dual Strap】Comes with two interchangeable straps, perfect for couples or those who prefer variety in style. 【Smart Notifications】Receive alerts for calls, messages, and app notifications directly on your wrist. Specifications: CPU: OM6626B Material: Zinc alloy + Epoxy resin Bluetooth-compatible Version: 5.3 Battery: 18mAh Polymer Lithium with protection IC Working Time: 3-5 days Charging Time: 2 hours Sensors: SC7A20H (Accelerometer), HX3918 (Heart Rate) Waterproof Level: Suitable for swimming and diving Charging Requirement: 1A or below App Compatibility: Android 6.0+ and iOS 11.0+ App Name: Nx Wear Operating Temperature: 0~45℃ Storage Temperature: -10~55℃ Operating Humidity: 5%~95% (non-condensing) ESD Protection: Contact ±6KV, Air ±10KV Surge Protection: 12V Package included 1 x Smart Bracelet 1 x Spare Wrist Strap 1 x Cable 1 x English and Chinese Manual Specifications Brand N/A Certificate CE,CE-RoHS,FCC-ID Color Gold Packaging Type Colored Box Plug Type (For Supply) N/A User Manual (Language) English and Chinese Gross Weight 0.095kg Volume Weight 0.061kg Package Length 9.200cm Package Width 9.000cm Package Height 3.300cm