Shure True Wireless Secure Fit Adapter GEN 2 closed-back Open-back (The housings are open

Open-back (The housings are open so they retain air and sound permeability

great resolution

The DOC diamond diaphragm unit can achieve a completely linear frequency response

Nozzle Size (lip): 6mm

Direct from manufacturer

Shure True Wireless Secure Fit Adapter GEN 2 closed-back Open-back (The housings are openTRUE WIRELESS FREEDOM WITH SHURE QUALITY SOUND. TRUE WIRELESS SECURE FIT ADAPTER GEN 2 Compatible with detachable Shure Sound Isolating Earphones The second generation of the Shure True Wireless Secure Fit Adapter set easily transforms any detachable Shure Sound Isolating Earphones into true wireless. Experience exceptional comfort, secure fit and water resistance with an immersive, world class listening experience wherever you go. Features True