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Automatic Tracking: Record all-day activities like steps, distance,calories,heart rate,blood pressure,blood oxygen and monitor sleep quality at night automatically::A good smart bracelet can help you to keep health::We would like to introduce this M5 Bluetooth 4.0 Waterproof and Dust proof IP67 Smart Bracelet for you::Designed with bracelet type, this smart bracelet is very convenient to count steps while you are doing sports::The IP67 waterproof and dust proof design, you can use it anywhere you want. Don't wait any more::High quality rechargeable polymer lithium battery for the Bluetooth smart bracelet and its standby time is more than 240 hours. In addition, it can measure your heart rate change::Military motion sensor, ultra low power Bluetooth 4.0 chip: The sensor is produced by Analog Devices, USA::This sensor is used in the US military helmet: the Bluetooth chip uses the power management supply manufacturer's AD51822 low-power chip. A 225MAH coin cell battery allows the chip to work for more than four years. Such ultra-low energy consumption can guarantee the smart bracelet to work for up to 10 days