According to https://www.npr.org/2024/02/23/1233677833/lunar-lander-odyss... it's a cube with four cameras, which was supposed to pop off 30 seconds before touchdown to capture pictures of Odysseus' landing. But EagleCam was deliberately powered off during the final descent because of the navigation switch and stayed attached to the lander.

The team will try to release EagleCam in the coming days, so it can photograph the lander from roughly 26 feet (8 meters) away.