Instruction: Answer the given question using the supporting document.

Input:
Question: how do i use this? i have an iphone, and do i need a special voice recorder too? which one?
Document: I just bought this from Radio Shack. It works great with my iPhone or Panasonic cordless phone. I do the recording via my computer or handheld Sony recorder.I compared this device to the "WeTalk" app that you can download from iTunes. The WeTalk is Wifi-based (e.g., you use the app to place a phone call over WiFi). The Olympus TP8 recording was clearer, and the incoming voice was much louder.
After trying other ways of recording phone conversations into my digital voice recorder none of which gave a clear sound I found the Olympus TP-8 pick-up mic on Amazon. It looked like just a wire and plug but the price was low enough to give it a try. After getting it in the mail and using it...I was amazed at the results. Perfect sound . The ear bud is comfortable and the wire to the recorder is extra long so I don't need  to hold the recorder.
Connect the end with the 1-inch long plug to the microphone jack of your voice recorder. Put the other end with the ear bud (3/4 inch long, 3 different-size black rubber ear bud cups included) in one ear. The 2 ends are connected by a roughly 1.3mm diameter, 4.95-feet long thin black cord. (3)Talk on the phone like you normally do, with the ear bud in the ear.
The biggest problem with this product is that it can only be trusted to work with an Olympus recorder. I tried it with a Sony, and it was absolutely not working, which meant that I ended up returning the Sony recorder and buying an Olympus one at the same price. Definitely worth it, because I intend to use these products to record phone interviews for the purposes of writing about the conversations.
A very impressive little mic. I use it in my Zoom recorder, where it sounds great, and in my Motorola Android phone (with adapter cable) where it sounds pretty good.If you use this with headphones on, your own voice comes through, but only very muffled.
Excellent quality for the money. My experience was buy it then use it with my Sony digital recorder. It works well through a range of voice volumes (soft speakers to loud speakers) and paces (slow to rapid). This has provided consistent performance. I was skeptical but the price offered enough potential value to take a chance. It was worth it!
I needed this for qualitative phone interviews for my thesis. I plugged this baby into the microphone jack of the recorder and it proved its worth immediately. Absolutely no problems, easy to use, and it picks sound up really well. It captured both my voice and the person's voice I was recording very clearly. I do not know what other reviewers are talking about when they say that it is fragile.
As a journalist, I have struggled with trying to find a quick and simple way to record phone interviews in a high-quality format. This little piece of equipment was recommended by a professor at my journalism school (she's a contributing editor to Vanity Fair and she uses this as well). I use this with my Sony Digital Flash Voice Recorder (ICD-PX312, HIGHLY recommended, ~$50) and it works GREAT.
I record phone conversations a lot. This works great. It picks up the caller's voice and yours too, which is exactly what you need.
I purchased 2 of these and neither one of them picks up/records the voice of the person I am talking too... a big waste of money... down the drain. Did not want to waste the time and effort and money in sending back!
Answer: i'm confused.  can someone tell me how this device works with a phone. does it actually get attached to the phone?  And how can i also listen to the conversation live.