Barang Ready Designed for better hearing, comfort and durability. duplex(r) 2.0 from Riester is distinguished by outstanding acoustic performance and comfort during the auscultation duplex(r) 2.0 is available with double stainless steel chest-piece. Innovative acoustic system with extraordinary auscultation for all frequency ranges. Precision double chest-piece made of stainless steel or Aluminium. Special membrane for precise acoustics, O 44 mm (1.7 in), with novel non-chill rims for improved comfort on the skin. Anatomically shaped binaural with internal multiple spring for adjusting the contact pressure. Extra-soft, replaceable and pivotable ear-tips for perfect sealing at the ear canal and enhanced wear comfort. Total length: 74 cm (29.1 in). Weight: 151 g (5.3 oz) stainless steel, 97 g 3.4 oz) aluminium. Latex-free. Including one pair of replacement ear-tips, a replacement membrane and a name plate. Made in Germany