Riester Duplex neonatal stethoscopeis a quality stethoscope with precision finished double chest-piece for new-born children and infants. With considerably improved acoustics. The particularly small precision chest-piece ofneonatal stethoscope is made of aluminium, especially for new-born children and infants. Special membrane, 28 mm, with particularly flat and soft non-chill rims for improved adaptation on the skin. Riester Duplex neonatal stethoscopeis supplied with a pair of replacement ear-tips and a replacement membrane. Frequency analysis:20 Hz 100 Hz max. 1.2 dB at 55 Hz100 Hz 1,500 Hz max. 8.5 dB at 300 Hz Bell: 22 mmOverall length: 76 cm