ERKA LISTEN TO BLOOD PRESSURE. MEMBRANE ERKA's convex membrane provides excellent resonance and sound transmission. PAVILION The aluminium chestpiece issimple and quick to clean and due to the material used Suitable for MR. EAR TUBES The ergonomic, adaptable shape of the ear tubes guarantees perfect comfort. The default 15° inclined ear tubes adapt to the characteristics of the user's ear canal. EARSETS Ergonomically shaped soft eartips adapt to the shape of the ear canal, providing great comfort and an excellent acoustic seal against ambient noise. Guarantee: 10 years Ref: STEALU01