Stylish Design: The W5SV features a sleek and modern design with a comfortable silicone bandLED Display: Equipped with a clear LED 7-segment display for easy viewing of time and notificationsVibrating Alarm: Set alarms and receive wake-up alerts through gentle vibrations, ensuring a peaceful start to your daySleep Monitoring: Track your sleep patterns and gain insights into your sleep quality for improved restLong Battery Life: With a 40mAh battery, enjoy up to 45 days of standby time on a single charge, making it convenient for everyday useDurable and Lightweight: Weighing only 18g and designed for longevity with over 300 charge-discharge cycles, it's the perfect companion for an active lifestyle Specifications: Model: W5SVMaterial: SiliconeDisplay: LED 7-segment displayCharging: Micro USB portVoltage: DC 4.5-5.5VBattery capacity: 40mAhSleep current: 25uAStandby time: 45daysAtmospheric pressure: m860hPa~1060hPaBattery life: > 300 times charge-discharge cyclesWeight: 18g