This new Active Pro model has more features and stronger battery life. Charge for 10 minutes and talk for 4 hours! **Measurement results of this product are for reference only not for any medical use. Android supports systems above 5.0, iOS supports systems above 9.0 Download App for Connectivity: Bluetooth connection to pair with App - Bluetooth Music* Bluetooth Connection also needed for Audio - Case size 38mm x 44mm - Case Thickness 10.4mm - Bluetooth Calling* - Call Records - Built-in large storage space for up to 1,000 mobile phone contacts - Message Notifications* - Intelligent Voice Control - Password Protect - Charging Reminder - Multiple Dial Options - GPS latitude and longitude - Weather* - Stopwatch - Remote Photography* - Exercise Record -Step Tracker & Calories Burned - Heart Rate Monitor - Blood Pressure - Blood Oxygen - Body Temperature - Sleep Data - Find Phone* - Sports Mode* - SOS* Pre-set emergency contacts