Here is a picture of an usb to hdmi adapter "http://www.amazon.com/eForCity-Micro-USB-HDMI-Adapter/dp/B005NG71K8" . One can buy it for example on amazon or at the local electronic store.
A fair price for an USB to HDMI is around $17. Some sites sell it for even cheaper like eBay or Amazon. One can also purchase an USB to HDMI from stores like Suture shop or Best Buy.
You cannot connect headphones directly to HDMI, Since HDMI is a pure Digital signal it needs something to decode it such as a receiver or a TV. USB on the other hand, you can purchase a USB sound card/ adapter, Its no bigger then a dongle used for cordless mice etc. Plug that into a usb outlet, and plug your headphone or speakers into it. A usb soundcard/adapter will cost any wheres as cheap as 12 bucks and as much as 99 or higher depending on the quality and features.
You don't use the Apple USB cable. This is for syncing with a computer. You need to purchase an iPad HDMI or VGA adapter, and connect it with those cables.
It depends on the adapter, but all USB devices will fit all USB ports, and all HDMI devices will fit all HDMI ports.
You can purchase a hdmi to bga adapter online at amazon.com or ebay.com. However, I believe amazon.com is more trustworthy but if you are looking for a good deal then you should try ebay.
Yes, the "Arkview Multi Display USB Video Adapter" is compatible with any computer that has a USB 2.0 to DVI/VGA or HDMI Adapter. You can connect up to 6 monitors and/or TV's.
You can purchase an adapter that almost alwys fits any USB cord or electrical cord. This adapters are located in many different stores, such as, Walmart o RadioShak.
There are a number of retailers that sell a Firewire to USB adapter. One can purchase such an item from Amazon, ebay, Maplin, Staples, Walmart and Best Buy.
One may purchase a DisplayPort to HDMI Adapter at: Amazon, E Bay, Future Shop, Best Buy, Apple Store, Dell, Costco, London Drugs, Tiger Direct, Monoprice.
There are several websites one may purchase a wireless USB adapter. Some of these websites include eBay, Amazon, Walmart, Best Buy, Newegg, and Target.
Connecting an adapter USB to a serial port is very simple. All you need to do is purchase a USB Serial Adapter. These range in price from $6.00 used to upwards of $30.00 new. http://www.Amazon.com provides several USB serial adapters to purchase online.