The SD Digital Phone Recorder with Phone Recording Software attaches to your phone line or phone handset to record both sides of your conversations as well as the Caller ID information and call duration. The included Call Data Management Software enables you to transfer calls to your PC for easy organization and retrieval. Recording a Phone Call at Home: Phone Line Recording The phone recorder is designed to work with standard, analog type phone lines. When using in this fashion you will be able to record any extension phone on the same line. This will also work with Vonage or Cable Company VOIP type lines. Recording a Phone Call at Your Office: Handset Recording This is where it gets tricky. If you have an office type phone / PBX where it has multiple lines, intercom, and hold functionality then you cannot plug this directly into the wall. You will need to use the handset connections. It will record your phone calls but will not store the caller ID data or work on extension phones. Think of it this way: It will record what you can hear with your ear, both sides of the conversation. What's in the box? 1 - Digital Phone Recorder 1 - Wall Power Adapter 1 - USB Cable 1 - 2GB SD Card 2 - Phone Line Cords 1 - Software CD