Here are some features of the Littmann Classic II stethoscope:

1. Dual-Sided Chestpiece: Like many other Littmann models, the Classic II had a dual-sided chestpiece with a diaphragm on one side and a bell on the other. The diaphragm is used for higher frequency sounds, while the bell captures lower frequency sounds.
2. Tunable Diaphragm: One of the features Littmann stethoscopes are known for is the tunable diaphragm. By adjusting the pressure on the chestpiece (light pressure vs. firm pressure), the user can switch between hearing low and high-frequency sounds without having to turn over the chestpiece.
3. High-Quality Tubing: Littmann stethoscopes use flexible, durable tubing that is resistant to skin oils, alcohol, and staining. This tubing helps isolate sounds and ensures longevity of the instrument.
4. Comfortable Fit: The ear tips are designed to provide an excellent acoustic seal and comfortable fit. The headset is also adjustable for individual fit and comfort.
5. Various Colors & Finishes: The Littmann Classic II came in various colors and finishes to cater to personal preferences.
6. Performance: While each model has its own rating, the Classic II was known for offering reliable acoustic performance for basic physical assessments.