Deauther Watch from DSTIKE is an ESP8266 development board, that you can wear like a smartwatch.
This ESP8266 development board comes with a 800mAh battery, OLED display and a 3-way momentary slide switch.
It comes installed with the latest ESP8266 Deauther software. With this software, you can perform different attacks to test WiFi networks.
You can also use it to develop your own software. It is simple to use, just like any other ESP8266 development board.
You can see the assembly instructions below.