You’d consider that the American FBI (being the United states FBI and everything) would have access to an earpiece a bit cooler that just the common ‘curly cable’ job, wouldn’t you?
If forced, I have to state that I often imagine some old fella, like Desmond Llewelyn in the Bond films, (and even a younger model like Ben Whishaw from ‘Skyfall’) producing many of the gadgets himself and then explaining them to the agents before they go out and guard the President’s life.
This is just not the case. They use the versions they use because they work and they work well. Basically, wired models continue to be more reliable than their wireless counterparts. With wireless, you tend to have more interference, as well as having to deal with more limited bandwidth. Essentially, you will need dependable tech when you’re in the field. Lives are at stake in a number of cases.
This straightforward, trusted earpiece might be relied upon to do the job, every time.
Another benefit that wired earpieces have over wireless ones (on this instance, at least) is the fact that a wired set needn’t carry an additional battery. Wireless earpieces would require charging and, as a consequence, would have a somewhat limited operational capability. It just causes a whole lot more headaches for people who, let’s face it, previously have a good bit on their plates to begin with.
According to ‘AskJeeves.com’
“The ear piece and mic that the secret service uses is called a Throat Mic. The Throat Mic has clarity that is unsurpassed, great sound quality, and allows for discreet interaction. It also has an acoustic air tube that makes it comfortable when worn for long periods of time”.
The ‘curly earpiece’ technology is generally rather common and is used by a number of individuals and organisations beyond the secret service. You are able to even purchase a wireless version, but do not expect the secret service to be involved!
I might argue another point, but this is merely a pet theory with little or no research to back it up. Psychologically speaking, when y’see a secret service agent, you identify them as such without seeing them in any kind of uniform (beyond a suit, shades and an earpiece), the earpiece, then, is a subtle reminder to you, the civilian, that not merely is this not a regular person inside a suit, but additionally the area in which you now end up is being strictly monitored.
With one word to his/her earpiece, the agent in question can probably call down all the other agents in the direct area, also as police, fire brigade and anybody else he/she believes is essential. That subtle reminder is probably a very potent crime deterrent. No guns need to be displayed, no helmets or flak jackets worn and yet y’know that this individual has eyes everywhere and could, potentially, really ruin your week. As I said, it is just a assumption, but I think it makes sense.