Description About Product Main Functions: Activity Tracker, Step count, Heart Rate Monitor, Blood Pressure Monitor, incoming Caller id, app Notifications Supported Mobile App Name in google play and apple store: Wearfit 2.0 The Smart Wristband only supports the following satisfactory mobile cellphones: IOS: OS must be IOS 8.0 or later, Bluetooth 4.0; Android: OS must be Android 6.0 or later, Bluetooth 4.0 For Android Smartphones, it can support all the function in the description. For IOS iPhone, it cannot support call reminder, message reminder, remote camera. Made by TPU Polymer composite material, it is light, high resistant and high damage resistance. Functions of invella M2S Smart Band: Activity Tracker, Heart rate Monitor ( Measures Heart Beats) Blood pressure monitor (Measures blood Pressure) Caller id ( Shows the Caller's contact name or number on the Smart band Screen) App Notification (Notification from Facebook, whatsapp) Pedometer (Counts Total Steps activity) Distance (total distance by walk) Cycling (total distance travelled by cycling with map) Calorie Burned ( total calories burned by walking, running, cycling) Time display (three types of clock display) Event reminder( Water drinking, Take medicine etc), Call reminider, message alert, Stop watch, timer Anti-lost (both way) Alarm