Description: Battery type: Lithium polymer battery Battery capacity: 90mAh Input voltage: DC5.0V Bracelet weight: 15g Full length of the bracelet: 240mm Full length Waterproof grade: IP67 Wrist buckle material: aluminum alloy System requirements: Support devices with Android 4.4 or iOS 8.0 and above versions Screen resolution: 160 * 80 Specifications: Support heart rate, blood pressure, and blood oxygen monitoring Support information push, call reminder, call rejection, and alarm reminder Supports long sitting reminders and bidirectional search for mobile bracelets Supports weather display, 4-speed brightness adjustment, 3 sports modes (running, cycling, skipping rope), 2 UI interface switches, and 13 languages Waterproof IP67 level Package Included: 1 * Host, 1 * Watch strap, 1 * Instruction manual