The ADEL-S1 Auto Module is a hearing conservation device, which houses the ADEL technology. It is designed to work with the A&U-Series earphones and the EP-Custom Earplugs. This module is engineered to automatically tune itself to absorb the pneumatic pressures in your ear canal through a dual membrane design. The ADEL-S1 Module provides approximately -18dB of noise isolation.
The ADEL-S1 Module DOES NOT fit into A-Series, U-Series earphones that contain the apex™ module socket.