M4 Smart BraceletProduct parameters:System ConfigurationBattery Battery capacity: 60MAH Standby time: 300 hoursWeight: Net Weight: about 18g TPU strap: length 245MMDisplay: OLED 0.42 inch heart rate: high progress Huajing sensorBlood pressure: simulated blood pressure chip Model: NDF51822Touch: Arc Screen Touch Sensor: Low Power 3 Axis Acceleration SensorWaterproof: IP67 Bluetooth: Bluetooth 4.0 compatible (Andrews and IOS)Charging interface: magnet suction packaging: cartons, data lines, brochuresInput voltage: 5V 1A Weight: full set of 78g Function configurationSMS: mobile phone SMS Bluetooth sync reminderTime: OLED display 24 pedometer: movement stepSleep monitoring: monitoring sleep quality sedentary reminder: sedentary time settingCall to remind: shock (call, SMS, micro letter, QQ, etc.)Heart rate: Monitor heart rate Blood pressure: Simulated measurementsBlood Oxygen: Blood Oxygen during Exercise Alarm Tip: Set via APPMovement plan: set by APPProduct list:1 * bracelet1 * charging cable1 * manual1 * box