Even more distinctive than shape is the fact that when the device is powered on, you can see a faint glow of red laser light around the port door. (howtogeek.com)
Now trapped in a round room with red lasers blocking all the exits. (disneyinfinitycodes.com)
Every enemy who sees you will take aim at you, one turn to aim (a helpful red laser showing their exact attack trajectory) and the next to execute. (darkstation.com)