The BabyCam app installed on two devices, one as the camera and one as the receiver, worked perfect connected to ship wifi even without buying the internet package. Worked anywhere on the ship. We honestly didn't need to use it, but it worked!! We also had this local monitor that we used within the room only and worked great, it stopped working when you got about 5 cabins away. We got a Jr. Suite so the baby crib was in the closet and let us shut the door but still monitor if he fell asleep. https://a.co/d/cY9D1vz