The Orange Pi Zero can be enhanced with one of two available expansion boards, the Zero Interface Board and the Zero NAS board.
Zero Interface Board
The Zero Interface Board connects to the Orange Pi Zero via the 13 pin connector. It is an expansion board that provides an additional two USB 2.0 ports, a 3.5mm AV jack, a mic, and an IR receiver.
Composite video out using the 3.5mm jack should just work.
There is an official case for the Zero Interface Board plus Orange Pi Zero. See below.
The Zero Interface Board costs approximately $2 plus shipping on AliExpress (affiliate link).
Zero NAS Board
The Zero NAS Board connects to the Orange Pi Zero via the 13 pin connector. It is an expansion board for Network Attached Storage (NAS) use cases that provides two USB 2.0 ports, a SATA port with accompanying SATA power connector, an M2 port, a 3.5mm AV jack, a mic, and DC in power connector. There are no USB 3.0 ports, so this is not meant for NAS use cases where USB 3.0 type speeds are necessity.
The DC in connector can be used to supply power to the Orange Pi Zero. The USB OTB port was not functional when I tested it with the pi board powered via the DC in connector, however.
The 3.5mm jack works well for audio out. Testing was done using mpg123 command line player to play mp3 files to stereo speakers.
Unfortunately, there is no official case for the Zero NAS Board like there is for the Zero Interface Board. If you do want a case, there is 3D printed case on Thingiverse.
The Zero NAS Board costs approximately $7 plus shipping on AliExpress (affiliate link).
Orange Pi Zero Case
The official case for the Orange Pi Zero is made for the pi board and the Zero Interface Board.
The Orange Pi Zero Protective Case costs approximately $2 plus shipping on AliExpress (affiliate link).
Additional Orange Pi Zero Information
For an overview of the Orange Pi Zero with specifications, performance data, or details about the available the available operating systems and their setup, please click through the following.