The IE 80S BT is the first audiophile Bluetooth in-ear headphones from Sennheiser. This high-end wireless model delivers outstanding accuracy and a breathtaking soundstage from a sleek neckband design. Audiophile quality is assured by Hi-Res codec support that includes LHDC, apt HD, and AAC and high-end AKM DAC. IE 80S BT headphones can be tailored to meet the needs of even the most sophisticated listener: the exceptionally balanced sound can be finely adjusted via the Sennheiser Smart control app And its 5-band equalizer, wired listening is made possible via an optional cable accessory, and the supplied ear hooks, and choice of ear adapters in silicone, lamellar and comply memory foam ensure a perfect fit for excellent passive attenuation of external noise and outstanding wearing comfort.