This system can be used to channel digital sound processing that allows users to monitor volume, filter out unwanted noise from airflow and wind. It provides direct, efficient, and smooth sound to your ear. It’s smaller than a credit card and discreet enough to conveniently fit in your handbag or wallet. The measurements (Lx Wx H) are very straightforward and easy to use: 1.3x 1.1x 1.8 cm. Suitable for patients with air-conducting hearing loss. It can be used as an air amplifier to help you hear the sound, indoors or outdoors, clearly and loudly. It is possible to control the speed