Frequency Module

You can't hear things very well in space. However, that all changes if you equip the Frequency Module. It goes in its respective slot on the Galacticraft tab of your inventory. This may also be used as a crafting ingredient in other recipes.

Display Screen

Right-click to change channels. Each channel displays a specific image or information. Place Display Screens adjacent to one another and Right-click them to increase their size.

Telemetry Unit

The Telemetry Unit is used to display information about a mob or entity onto the Display Screen. To use, place behind or next to the Display Screen.

To display information about a mob or entity, left-click that entity with the Frequency Module, then Right-click the Telemtry Unit. Information about the entity will be displayed on the Display Screen when set to the right channel. You can use this to display information about Rockets.

To display information about a player such as health, food, and oxygen, that player must Right-click the Telemetry Unit with the Frequency Module and then wear that Frequency Module in the appropiate slot in the Galacticraft tab of your inventory. Once the player removes the Frequency Module the link is broken.

Communications Dish

According to the official Galacticraft Wiki this currently does nothing, except look really cool.