This awesomely unique card makes it a powerful learning tool for all studio musicians, sound engineers, and producers. It's a nicely designed quick reference cheat sheet that contains audio frequency ranges for 16 instruments all in one place. The Cheatsheet Features • Small size 6"x 9" is great for taking on the road • Laminated to protect against the elements • 16 Instruments with Featured Sound Frequencies Range Ideas for each • Instruments are neatly grouped in 11 colorful column to easily compare • Ranges are from 20 Hz to 20,000 kHz • Caution row to help sound engineers avoid bad sounding output • Includes 1 FREE glow-in-the-dark guitar pick • Designed, printed, and packaged in the U.S.A.