The article discusses the use of controllable, illuminated wristbands at Taylor Swift's Eras Tour, which are produced by PixMob. The wristbands can be controlled using infrared signals, and some people have expressed concerns about the potential for hacking or misuse. The company claims to have a sustainability program in place, which includes collecting the wristbands after shows and reusing them. The article also mentions the possibility of using a Flipper Zero device to control the wristbands.