Headphones Koss KEB / 15i Gray (24 months warranty):Discover the legendary quality of Koss. Headphones with a stylish design, high-quality sound, and a microphone for making calls don't need to cost a fortune. The dynamic drivers have a frequency range of 18Hz to 20kHz, so you can enjoy the perfectly clear highs, as well as the lows of the deep bass. All this, along with a sensitivity of up to 110dB, guarantees highly precise sound reproduction.The silicone earbuds come in three sizes, so you don't have to worry about them not fitting perfectly or falling out. They are also excellent at isolating from ambient noise, which you'll definitely appreciate - especially on public transport. The cable is 120cm long and features a microphone and controls for receiving phone calls.