MyKronoz is a Swiss company that just released on the market very light 45 gram SmartWatch.
Connection of the phone and a sports watch is a very interesting solution for people who are always on the run. The device is equipped, among other things with the pedometer and heart rate monitor, there is also a counter showing how many calories we have burned.
Zetel has a single slot for the SIM card and supports 2G network which involves the ability to use Siri with built-in microphone.
The battery in smartwatch allows for up to 3 days standby time of the unit or 3 hours of phone calls. It is worth mentioning another function, so if you have a phone with an Android version 4.3 or iOS 7.0 or newer, you will be able to connect it with SmartWatch and then you would be able to use it for an example as the remote for camera.
The price of this device is around $190.