Features??Wide Compatibility: for Android 4.3 and above, for iOS 8.0 and above. Support BT 4.2LE connected. Fit most smart phones BT 4.2 Wireless Technology: Track and record your health data such as steps, sleep, heart rate and blood pressures real-timely and transmit live, accurate data to your smartphone.Provide Accurate Data: The data provide include pedometer, distance, calories modes, monitors blood pressure,heat rate and sleep, and notifies incoming calls and messages.Comfortable Wearing: Soft TPU strap wrapped around your wrist, then enjoy you life with an innovative and easy to wear design.Easy Operation: Long press the fingerprint sensor area below the display screen. and start up 8 to 9 seconds. Long press for 5s to turn off.Easy Pairing with Phone: Before connecting,please make sure the BT on your phone is turned on and then press touch area on the wristband for 8-9s turn on it, download and install SmileRunApp from app store, connecting My Device. refresh the list and rename the band.Note: Please read the user manual carefully before using it.Functions:1. Time Date Display2. Pedometer Mode3. Distance Mode4. Calories Mode5. Blood Monitor 6. Heart Rate Monitor7. Sleep Monitor8. Arrhythmia Alert (Vibration)9. Alarm Alert (Vibration)10. Incoming Calls and Messages Notifications (Vibration)