In Stock. The AKG MP-40 Micro Pen is the smallest and coolest lavalier mic on the market. It's integrated miniature microphone with an 8" extension cable attaches to the "ink pen" style transmitter for the utmost in ease and function. Just clip it on a shirt pocket (or hang it around your neck with the supplied cord), and you are ready to go! Comes with receiver, and AC adaptor.