Android System can support all function in the description;</br>IOS device and other device such as iPhones only support: Pedometer?? Calendar?? Call Sync?? Calculator?? Cloc"opwatch.</br>Battery with high voltage of 3.7V lithium ion polymer and high-capacity??208 hours of standby time??upto 4 hours of talk time</br>Some functions require install APK on Android and wont work on IOS Device</br>Android Supports Functions: Sync?? Passometer?? Calculator?? Stopwatch?? Alarm Clock?? Anti-lost Alarm?? Barometer?? Thermometer?? Sleep Monitoring?? Music Player?? Call History?? Set Time/Date?? SMS?? MMS?? Wechat?? QQ?? and Remote Camera.</br></br>Product Description</br></br><b>Note: Android System can support all function in the description; BUT IOS device and other device such as iPhones only support: Pedometer?? Calendar?? Call Sync?? Calculator?? Clock?? Stopwatch.</b> <br>Every PHtronics TM product come with 12-Month warranty. Only our authorized re-seller on line. Before you make purchase?? please buy it from our Authorizes reseller.</br> <br><b>Features:</b></br> <br>1.44/" TFT LCD -Time / Date / Week / Battery state display </br> <br>Ringing reminder when you receive a call -Ringing reminder once your mobile phone disconnected -Display the number or name of incoming calls </br> <br>Answer or Dial calls from your wrist </br> <br>Stopwatch function </br> <br>Support hands-free calls </br> <br>Play the music in your phone (after Bluetooth paring