Al principio me parecieron mi buenos, los usaba constantemente, duraban bien la pila y muy cómodos. No damage. It’s everything you’d want in a Bluetooth sleep mask. In other words its not flashy or gaudy. I received my unit. eek! It was truly exactly what we were looking for. I just received this charger today and so far it is working well! Had seen one issue that it was only offered with USB connector, however with Jabra Evolve 30 II Stereo, i got best quality sound for calls, and controls along with noise cancellation and it comes with 3. The added bass quality was a great surprise too!