The Deauther Watch V3 is an intriguing smartwatch. Based on an ESP8266 board, the device can hack Wi-Fi networks and can even create fake ones. The Deauther Watch V3 also has a 1.3-inch OLED display and is orderable for US$65.00.
https://www.notebookcheck.net/Deauther-Watch-V3-A-smartwatch-aimed-at-hackers-and-penetration-testers.521535.0.html