Poly Blackwire 3325 Wired Dual-Ear Boom Mic USB C & USB-A & 3.5mm Noise-Canceling Mic For PC & Mac & Mobile Works with Teams (Certified): From the manufacturerCompatibilityCompatible with PCs via USB/USB Type-C®, connects to mobile devices and tablets via 3.5 mm (BW3315/BW3325) and devices that support USB Type-C®ColorBlackBoom mic length (mm)135 mmSensitivity (microphone)11 dB SLRSignal-to-noise ratio>24 dBImpedance32 ohmCab