Stylish Design: The W5SV features a sleek and design with a comfortable silicone band. LED Display: Equipped with a clear LED 7-segment display for easy viewing of time and notifications. Vibrating Alarm: Set alarms and receive wake-up alerts through gentle vibrations, ensuring a peaceful start to your day. Sleep Monitoring: Track your sleep patterns and gain insights into your sleep quality for improved rest. Long Battery Life: With a 40mAh battery, enjoy up to 45 days of standby time on a single charge, making it convenient for everyday use. Durable 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: W5SV Material: Silicone Display: LED 7-segment display Charging: Micro USB port Voltage: DC 4.5-5.5V Battery capacity: 40mAh Sleep current: 25uA Standby time: 45 days Atmospheric pressure: 860hPa ~ 1060hPa Battery life: Over 300 charge-discharge cycles Weight: 18g