This is probably the tiniest high-end portable audio recorder from Yamaha. Weighing only 1.7 ounces (49 grams) with batteries, it’s only 13 millimeters thin and will slip nicely into any shirt pocket. But don’t let the size fool you, within its lightweight package it contains a large 2GB memory that let you record up to 3 hours of music with linear CD-quality, or 9 hours continuous recording in compressed MP3 mode. It comes with software to easily extract the recordings to your PC. Yamaha POCKETRAK 2G Pocket Recorder is perfect for recording seminars, concerts, or even undercover assignments. Priced around $300