Logitech BPS420-M. Microphone frequency: 100 - 10000 Hz. Frequency response: 200 - 15000 Hz. Interface: USB 2.0, Headphone connectivity: 3.5 mm, Connectivity technology: Wired. Width: 120 mm, Depth: 32.5 mm, Height: 120 mm. Certification: CE, FCC, UL, KCC