Hands-free microphone with convenient click-to-answer button.Noise-Isolating earbuds.Lightweight and compact.3.5mm connection to most audio devices.Speaker Drivers: 10mm, Frequency Response: 20-20,000 Hz, Sensitivity: 93dB@1kHz, Impedance: 16 Ohms Enjoy hands-free use of your iPhone and other smartphones with the RCA Earbuds with In-Line Mic. These high-quality earbuds feature a convenient click-to-answer button on the in-line microphone that quickly answers any phone call. The noise-isolating earbuds make it easy to hear your callers or other favorite audio. They're lightweight and compact and ready to go right out of the box. Just plug them in and you're ready for some high-quality audio.