The CX 880i in-ear headphones from Sennheiser provide high-quality audio in an elegant design. The headphones feature a classy look with an ergonomic construction that channels the cables away from the ears for a comfortable fit. Dynamic drivers with specially-tuned transducers create clear, lifelike audio with a wide frequency response.
The headphones come with 3 different sizes of interchangeable eartips, allowing you to find the best fit for comfort and noise isolation. The cable features an integrated microphone and 3-button remote that allow you to make phone calls, take voice notes, control music playback, and adjust volume on compatible smartphones and MP3 players, such as the iPhone and iPod touch. A cable clip is included for cable management while ear debris guards and a cleaning tool keep your headphones in great shape. The standard 3.5mm plug provides compatibility with MP3 players, CD players, and more. A handy leather pouch is included for storage.
| Type | In-Ear |
| Frequency Range | 17Hz - 23kHz |
| Impedance | 32 Ohms |
| Sensitivity | 115dB |
| Maximum Input Power | Not Specified by Manufacturer |
| Microphone | Omnidirectional, 80Hz - 15kHz, -40dBV/Pa Sensitvity |
| Connectors | Standard 3.5mm Stereo Mini Plug |
| Cable Length | 3.9' (1.2 m) |
| Weight | 0.39 oz (11g) (Without Cable) |