Hello , everyone. I used this device with many difficulties. This is a device , which I dont recommend to anyone. It name is smart but function is not smart . It is not user friendly device. As well as it is a uncomfortable to wear . It is a heavy device. No one can wear it for a long time . Sometimes it dont connect to the phone when you connect it through the bluetooth. Its battery is ok. Its looks are not good. It is simple. This device is expensive as tha device dont have much features.