Instead, the packaged iPod earbuds included a three-button device on the right earbud cord. Open-back and earbud headphones provide some passive noise isolation, but much less than the others. The commercial features 2 Chainz, destroying a generic pair of earbud headphones with a sledgehammer. Each earbud features an ear hook design to ensure a secure fit. The "In-Ear" (IE) headphones were released in 2006 as the company's first earbud product. The earbud uses either a moving iron driver or a piezoelectric crystal to produce sound.