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Cross-Border Ultra3 Bluetooth Watch T900u for Calls, Heart Rate, Blood Pressure and Sports, Huaqiangbei S9ultra Smartwatch. Dual Bluetooth 5.3: Supports Bluetooth 5.3+5.3 dual-mode for stable connectivity. IP67 Waterproof: Rated IP67 waterproof for durability in various conditions. Long Battery Life: 200 mAh battery provides 5-7 days of normal use. HD IPS Display: Features a 2.2-inch IPS HD fully touch screen. OEM/ODM Support: Customizable digital print patterns and logos on most materials. Multi-Function Tracking: Monitors heart rate, blood pressure, and supports sports modes.