The 306 has zigzag and capacity for decorative stitches using a flat cam (attached by the large silver nut, upper-right corner of the machine in the photo). It takes the still-available but harder-to-find and more expensive 206X13 needles; there is a modification to allow it to take the more-common 15X1 needles, which is subject to some controversy. I like the 306 a lot; it's simple, reliable and makes a soft, pleasant, clackety-clack when it runs because of its internal-drive cleated belt. The machine in the photo is black, not green.