Dual head Aluminum alloy chestpiece
5 way convertible design: large diaphragm, small diaphragm, adult size bell, medium size bell, infant size bell
Spare eartips of 2 different sizes for best comfortable use
Soft ear-plug,PVC protective cover
Dual-leaf spring is more durable and adjusts to different sizes for better fit.
Dual-lumen acoustic tubing decreases sound attenuation and ensures sound quality.
One side for child,another for adult
Shipping and handling: Free shipping.
Service: Postal Service.
Estimated Delivery within 12 - 30 days