No.1 is the most recognized Chinese smartwatch manufacturer, not only because of the great devices it delivers but also because it’s one of the few companies that deliver “real” smartwatches, since most of Chinese smartwatches only have a JAVA OS. That’s because Google is a little strict on Android Wear licencing.
So, No.1 delivers smartwatches that are powered by Android OS, the full version that is found on smartphones, giving the devices practically all the benefits and apps of full Android.

This time, No.1 announces the No.1 D6, the successor of D5 that had Android 4.4 KitKat on board. The D6 is powered by Android 5.1 and its design is closer to a classic watch rather than the futuristic designs we encounter in many other models. Below you can see the full specs list of the device. As you can see, its hardware is pretty strong for a smartwatch, giving the device a score of 18,000+ on Antutu.
| System |
Android 5.1 |
| Cpu |
MTK6580 |
| Resolution |
320 * 320 |
| RAM |
1GB |
| ROM |
8GB |
| Wifi |
Support |
| Google Play |
Support |
| Features |
|
| Bluetooth |
BT2.1 + BLE4.0 |
| Browser |
Support |
| Barometer |
Support |
| Voice Search |
Support |
| Alarm |
Support |
| Weather |
Support |
| Change Clock Face |
Support |
| Hardware |
|
| Speaker |
Support |
| Memory card |
Support TF Card |
| Battery capacity |
450mAH |
| Side buttons |
Support |
| G-SENSOR |
Support |
| Cpu |
MTK6580 |
| Resolution |
320 * 320 |
| RAM |
1GB |

You can learn more about the No.1 D6 on its official page
[source]