The Lenovo Headphones provide great sound quality and fit every ear. With 3 unique designs, you can find a fit for any ear. The headphones provide excellent sound from your Think system’s 3.5 mm audio jack. The inline controls work the majority of smart phones in the market, so you can stay in touch and on the go between the office and your home. 3.5 mm audio works with ThinkPads, tablets, work stations and smart phones.Lightweight design allows users to carry it with themUnique ear designs:On Ear – fits like a classic earbud headphoneIn Ear – fits comfortably inside the ear canal, with 3 silicon tipsOver-the-Ear – combines the best of the in-ear headphone with an over-the-ear loop to keep the headphones securely in place.Inline microphone is small and light, perfectly placed to make crystal-clear callsInline answer and hang up control works with the majority of smart phones.