Features: BT 3.0 Technology: Bt3.0 transmission, auto-match with blood pressure monitor and then it can be controlled by app. Quick Intelligent Inflation: fully automatic inflation and dynamic measurement in accord with real-time blood pressure detection, which reduce measurement time and increase user comfort. Accurate Reliable Measurement: high accurate and reliable to monitor hypertension, hypotension, classifications of blood pressure, and pulse rate etc. Smart Reminding Function: WHO hypertension indication in app after measurement(Include measurement graph). Offline Measurement Function: you can do your blood pressure measurements anywhere under no web condition. Compatible for IOS 6.0 Android 3.0 or above devices. Suitable for wrist circumference from 13.5cm to 22cm. Note: 1.Those who have arrhythmia, diabetes, obesity, smoking, blood circulation or apoplexy problem, please under physician's instruction. 2.Please keep quietly for 1 to 1.5 minutes, and avoid eating, drinking alcohol, exercising and bathing before measurement. 3.Download the app iHealth MyVitals from App store and install it. 4.If any necessary to interrupt a blood pressure measurement, press the Start/stop button to stop measurement, long press for two seconds to turn it off. BT connection with your device: 1.Apply the cuff and press the Start/stop button, and the BT indicator will begin flashing. 2.Turn the BT On in your device. 3.Connect the model name as BP7 xxxxxx. 4.Use the app iHealth MyVitals to start use your blood pressure monitor. Offline Measurement: Note: Before the first offline measurement you need online condition to make the BT connection in order to turn the offline measurement on in the app. 1. Apply the cuff and press the Start/stop Button. 2. Its BT will connect automatically with your phone under no web condition. 3. Do your offline measurement.