Koss UR23i Over-ear Headphones, Black

The Koss UR23i is a set of wired, over-ear headphones designed for personal listening. Its closed-back acoustic system and soft ear cushions provide passive noise isolation, which helps to focus the audio for the listener. The headphones operate with a frequency response of 20 to 20,000 Hz. With an impedance of 34 ohms and a sensitivity of 94 dB, they are compatible with most standard mobile devices and audio players without requiring a dedicated amplifier. The earcups feature a D-profile shape intended to match the natural contour of the ear.

Connectivity is handled by a non-detachable 1.22-meter cable that terminates in a standard 3.5 mm plug. Integrated into the cable is an in-line, one-touch remote and microphone. This control unit allows for managing music playback, including play, pause, and track skipping functions. It also enables the user to answer phone calls directly from the headphones. The lightweight construction makes the headphones suitable for portable use.

• Over-ear fit with a D-profile earcup design
• Wired connection via a fixed 1.22 m cable with a 3.5 mm plug
• Operates at 34 Ω impedance and 94 dB sensitivity
• Features a standard frequency response of 20 Hz to 20,000 Hz
• Includes an in-line microphone for hands-free calls
• Provides a single-button remote for media and call control
• Utilizes a closed-back acoustic design for passive isolation