This is the Ultra Thin Digital Voice Recorder offered at ThinkGeek. It measures at only 6.5 mm thick at the credit card size and it comes with 1GB of built-in storage, a flip-out USB connector, and flush-mounted controls. You can also use it as an MP3 player or an USB drive. The audio recorded will be saved it WAV file format. The Ultra Thin Credit Card Voice Recorder is available at $70.

[via TechFresh]