I was looking for a device that would AUTOMATICALLY record all incoming and outgoing phone calls in a form that can be heard and saved. This device worked exactly as promised. I was worried it might not work because I'm using Ooma, a VOIP phone service. But according to Ooma, my phones work like regular analog phone lines. I was also concerned that I use an AT&T wireless headset for most of my calls, but this device seems to treat the headset as just another phone extension. I just plugged this device right in front of the headset. In other words, the phone line entering the LINE jack (or Line 1) on the back of the headset was instead connected to the LINE jack on the TR600 and then (using the phone line supplied with the TR600) to the lines from the TR600 the LINE jack on the back of the headset. Whether incoming or outgoing, this device now records everything. To listen to your recordings you have several options: a) Listen to them on your TR600. It's uncomfortable and not comfortable. Although I was able to do this, I don't use this option. b) Remove the SD card from the device and insert it into an SD card reader connected to your computer and either transfer the audio files from the SD card to your computer or play them directly from the SD card reader.c ) (and this, in my opinion, the best option), use the included USB cable to connect the SD600 to your computer. Your computer will see it as an external drive, so you can play it, transfer it, delete it, etc. OR there is a downloadable application (address given in instructions) that allows you to manage, play, delete etc. all audio files. Audio files are saved as .wav files which are readable and playable on most computers. My ONLY reason for giving four stars instead of five is because the instructions are complicated, especially since most of us don't know much about our phones - are they analog? Digital? VOIP? But that does exactly what I want. Another advantage is the "loopback" option, which tells the device what to do when the SD card is full. One option is to just stop the recording, but I chose the option which discards on a first come, first served basis, meaning when it fills up the oldest .wav file is discarded to make room for to create the new one. If you regularly just transfer files from SD card to your computer, you never have to worry about the card being full. I calculated that one minute of recorded audio is around 250KB, so 8GB is standard. The SD card stores 4000 minutes of audio. Of course you can install a larger SD card, but the weekly file transfer to your computer means that the included 8GB SD card should be more than enough and you won't need it.
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