Wireless standards and power cables are on the dock.
The US Federal Communications Commission has unsealed some test reports about the Switch that show some of its hardware capabilities.
Among the information in the reports is the existence of support for high frequency (5GHz) wi-fi, supporting the 802.11ac MIMO standard. This compares to the G standard in use on 3DS and the N standard on the Wii U. Switch also will include Bluetooth support, including a low energy mode only supported in the 4.0 version of the standard.
Other information about the system's battery was also mentioned in the documentation. The report indicates the battery is not user replacable, but the AC adapter for the system is rated for 100 - 240 V and 50/60Hz which allows for worldwide use without a voltage adapter. Switch would be the second Nintendo console, following the Wii U, to use a global adapter.