9 seconds. Theres a DPI button just behind the scroll wheel. I was unpleased because the color was off between what I received and the photo online, but the company was quick to rectify the issue and they have fixed the photo online to better reflect the product. Now I have a nice backdrop for my home office to hide cables and antennae on the wall behind the loft. The sound quality is clearly tuned for voice calls as it is a bit tinny. - Son muy livianos, inmediatamente al sacarlos de la caja se sienten livianos y eso se aprecia mucho al tenerlos puestos por horas- Los materiales son buenos sin llegar a ser premium, creo son lo suficientemente buenos para que duren muchos años con un buen cuidado. We used it on vacation at the beach on the ocean front patio and it was more than able to be heard quite well above the din of the beach crowd and surf. They are attractive. I wish I would of known they are running large. Doesnt bother me.