Meet the DSTIKE Deauther Watch V3: a smart watch with a ESP8266 development board that can be used to test networks for security. This gadget can disconnect 2.4g WiFi, create fake networks, confuse WiFi trackers, and monitor packets. It also has a laser built-in with a range of 100m.
The watch runs for up to 10 hours on battery. It has a 3D printed case with an acrylic cover.