Now for the actual function of the equipment itself. There is a single security knob to attach the carrier and once secure, the knob can be locked with the key that comes with the carrier. I checked a few other retail stores, but really, there was nothing at all comparable available from Teva. I wanted to love these, but the cork on the insole was already coming off upon arrival. Overall, I am completely satisfied with my purchase. Mechanically, theyre Sennheiser - that is to say well built, creak-free and nicely finished. As an example, when I set my bench power supply to 14. If you have a wide foot, this shoe may not be for you as its more of a slender sandal width wise. ✅ Modo de escucha sin quitarte los auriculares (modo transparencia). With only 1 driver like on the Airpods or the Sonys, they have to compensate for the lack of reach in either end of the spectrum through the equalizer, but that comes with a loss in fidelity.