I use my Tp-8 for more than telephone calls as it records specific audio pretty well even in a noisy environment.

This is my second TP- 8 I have, and it works great for recording telephone calls, and if you use an olympus voice recorder. The set has three interchangeable tips or earbuds for a better fit. It is a simple device to use. The TP-8 also works as a microphone for other needs as well. Such uses can include recording for a video, and pretty much any other method of means to use a microphone.

This is the second microphone I have for recording purposes, and it is much more efficient in my opinion. It does not require a cell battery unlike my other mic, and it has interchangeable ear covers for proper use. I recommend this product, but remember that this microphone is to be used for phone calls.

I have 2 of these, and I use them for everything I record.