DELL Speakerphone – SP3022. Device type: Universal Signal-to-Noise Ratio (SNR): 80 dB Cable length: 0.85 m. Frequency range: 90 – 20000 Hz. Microphone frequency: 120 – 7000 Hz Microphone direction type: Omnidirectional Microphone sensitivity: 72 dB. Connectivity technology: Wired USB connector type: USB Type-C. Width: 71 mm Depth: 226 mm Height: 58.7 mm