The lapdock also has no headphone port to call its own, but the Atrix's headphone port is still fully functional.

Unlike the Mega-CD, its compact size and addition of a headphone port enabled it to play audio CDs on the move, powered by two AA batteries.

It included built-in stereo speakers, microphone, audio line in, audio line out and two headphone ports near the right speaker.

Recently I scraped a whole lot of salt out of the headphone port of my iPhone 4.

The cartridge is slightly broader than a normal Game Boy Advance cartridge and includes a built-in headphone port as well as an SD Card slot.

It has a 2.5-inch color screen, a rechargeable battery that is good for two and a half hours of running time, a DC power jack and a headphone port.

All Pod variants include headphone ports and recording ports, and can be used to feed a signal into an amp or directly into a PA system.

It included USB 1.1, FireWire 400, a headphone port, and a built-in microphone, integrated 802.11b wireless radio, as well as Bluetooth.

The adapter has its own integrated headphone port, but uses the parent console's power supply, controls, and display.

On the bottom of the system, you'll see the standard headphone port and the charging port.