1. The interface diameter is approximately 44mm, and the sound transmission result is good, clear, and without noise.

2. Selected material is made of high-quality aluminum alloy, after finishing and surface treatment, it has the advantages of a smooth surface, logical structure, stability and reliability, colorful appearance, and beautiful design.

3. The vibrating diaphragm is made of high-quality materials, with good wear resistance and excellent sound transmission results. The spring steel sheet on the ear hook adopts imported steel sheet material, which can be freely adjusted according to the size of different face types, with good elasticity, softness, and not easy to break.

4. The Y-shaped tube adopts PVC material with good cold resistance and is not prone to aging and hardening.

5. The colored soft ear cushions are comfortable and gentle without pressure on the ear vestibule. The sound transmission result is clear and noise-free, suitable for use by general medical personnel.