This is a new updated smart watch, which with many functions and easy to use. You can dial via watch SIM or Bluetooth optional, phonebook, call history, stopwatch, pedometer, calories calculation, sedentary remind, sleep monitoring, remote photos, music playing, alarm clock, two-way anti lost remind, voice recorder, muti-timezone, muti-language, daylight saving time and notification push including Facebook, twitter etc. Working Models: You can use a lot of features including answering and dial-up, send/reply messages,take pictures, play music etc. while you you install a GSM 2G/2.5G Network SIM Card into the smart watch. And you can use Bluetooth technology to connect to your phone, so that you can receive the display notifications like texts, calls, emails, and app updates.