What your doctor really listens for with a stethoscope
Amazon.com: Greater Goods Premium Dual-Head Stethoscope, Clinical Grade Option for Doctors, Nurses, Students, or in The First Aid Kit for Home (Black) : Industrial & Scientific
Amazon.com: Trunab Stethoscope Carrying Case Hold 2 Stethoscopes or BP Cuffs, Compatible with 3M Littmann/MDF/ADC, Medical Case with Extra Pocket for Nurse Accessories, Essentials for Nurses, Doctors, Black : Industrial & Scientific