Choose from 7 lovable animal face plates (frog, bear, panda,, deer, koala, monkey and tiger) for your stethoscope. The CK-F601PF/ F606PF is a single-head stethoscope registered with multi-country patent that has a built-in sound centralizer. It also features a deluxe binaural with inner spring and a chestpiece made from plastic-steel material.