Researched with the Blueprint: Receiver at the Research Table. After crafting and placing the Receiver, the player must also research, craft and place three Antennas. Before signals can be received, the Receiver must be placed at least one full floor above the foundation and Antennas must be placed on the same floor as the Receiver, or one half level above or below. Turning on the Receiver requires a Battery, which is continuously depleted as long as the Receiver remains switched on. One battery charge is used every ten seconds, so a full Battery (of 50 charges) is depleted in 500 seconds, i.e. 8 minutes and 20 seconds.