I use this wireless headset for up to 8 hours at a time. I had to make several initial adjustments to the headset base to obtain a favorable speaker volume. The headband around the headset does not allow sufficient room to comfortably remove the microphone away from the mouth (2 fingers). The mouthpiece can slide up and down in front, above or below the mouth. I also own a wired Plantronics S12 headset which includes a feature that allows you to pull the mouthpiece away from your mouth without moving the headband. This omission from the wireless design is a major inconvenience for me. I gave the headset 4 stars anyway because I get crystal clear reception all over my house with no interference from other appliances.