They also have a built in microphone that the student uses to Zoom with a math tutor. The price point is perfect and works flawlessly. Thinking maybe this was due to power delivery issues to my on-desk USB hub, I tried moving the dongle to the front-panel ports on my case. Not terribly impressed with these. Waaaay too big. Son cómodos si vas a estar con ellos puestos media hora o un poco más, pero cuando te pasas de la hora, las almohadillas adaptables a la oreja se vuelven incómodas. After a month it break down Fit perfectly in my cabinet. The straps are velcro which I find so much easier than the buckle type that you have to stick through the hole. I bought the Sennheiser wireless headphones, and am generally very happy with them, except for the ear pads.