Features: [Real-time Monitor]: 24-hour real-time monitoring of heart rate, blood pressure, blood oxygen, scientific guidance and healthy exercise, temperature detection, high and low temperature warning. [Multiple Sport Mode]: More accurately measure calorie consumption and changes in heart rate and blood pressure, allowing you to exercise more scientific. [Rechargeable Battery]: Built-in 340mAh lithium battery, work time up to 2-3 days. [USB Charging]: Easy to charge, 3-hour for fully charged, don\'t worry about running out of electricity when travel outside or on business. [Sync Information Reminder]: Cloud data synchronization, BT connection, do not miss important calls and messages. [Visible At Night]: Clear back light at night, without fear of darkness, humanized and practical. [Outdoor Accessory]: Great accessory for outdoor sports/adventure, GPS/Mileage/Compass/Sensor provide great help in the wild.