Sennheiser IE 800 audiophile in ear headphones . Both sides are working as expected!. Comes with headphones and case.

Manufacturer description:

- Dynamic linear-phase 7mm transducer delivers extremely wide frequency response (8-41,000 Hz (-3 dB), 5-46,500 Hz (-10 dB)).

- Connectivity Technology: Wired

- The precision ceramic housing features attenuated dual-chamber absorber (D2CA) to deliver extremely low harmonic distortion even at high output levels (< 0.06% (1 kHz, 94 dB)).

- 16-ohm impedance compliments portable audio devices.

- Ergonomic, oval-shaped ear adaptors for maximum comfort.

- 1.2 m symmetrical, oxygen-free (OFC) copper cable.