The lenovo headphones provide great sound and fit every ear with 3 unique designs you can find a fit for any ear the headphones provide excellent sound from your think systems 3 5mm audio jack the inline controls work the majority of smart phones in the market so in between the office and your home you can stay in touch and on the go 35mm audio works with think pads tablets work stations and smart phones lightweight design allows user to carry with them unique ear designs on ear fit