Getting that flash off of your camera, and placing the flash wherever you want it can be exciting! I think your images will improve beyond your wildest dreams, once you start using wireless flash triggers!
Here is what to keep in mind as you look to purchase wireless flash triggers.
"AA", or Double A batteries are rechargeable. They are cheaper than almost all other batteries. Wireless flash triggers accept all types and sizes of batteries. Keep in mind that smaller batteries may be easier to carry around in your pockets, but they will cost you a lot more in the long run. This is not the most important factor when shopping for Wireless flash triggers, but it is up there.
How far away can you be and still make the flash go off? This is a big concern because you want remote capabilities, right? I suppose how remote is the question. Check with what manufactures say on the packages, and then erase that from your memory. They will never produce a flash, over and over, at great distance. I don't care what you read, or what you have seen. The further away you get, the less accurate they will become. Find some that rate very good, at reasonable distances.
There is only so much real estate on your camera top. Will your new Wireless flash triggers fit vertically or horizontally? Will your new Wireless flash triggers get in the way? Will you hit your eye with them each time you shoot? This is very crucial, and you need to consider this factor. I have thrown away a set of Wireless flash triggers just because they kept creeping down, into my face.
Some "slave" units will have a hot sync of some sort built in for passing the triggered flash on. This hot sync is for a second or third flash. So, having one "trigger" and one "Slave" you can fire multiple flashes. Very key in most types of photography. Plus, less slave devices means less remote flash failures. Truth is, they simply will not fire every time, no matter the brand or type of Wireless flash triggers.
Some triggers will have a sync, and some will have a female, mono 1/8th jack. Knowing which chords, chord ends, and adaptors you will want is important. What do your flashes require? That is what you need to convert your Wireless flash triggers to accept.
PocketWizard accept AA size batteries. I use this battery to be specific, below, because I only need to purchase them once. Rechargeable batteries make sense, and in a bunch of ways.
PocketWizard are sold as separate pieces, or as transmitter and receiver pieces. PocketWizard are also now sold as transceiver units, which is all in one. These, newer units can transmit or receive, hence the name "transceiver". The preference is yours.