DELL SP325. Device type: Universal, Product colour: Black, Cable length: 0.75 m. Output power: 3.2 W, Frequency range: 90 - 20000 Hz. Microphone frequency: 100 - 14000 Hz, Microphone direction type: Omnidirectional, Microphone sensitivity: -37 dB. Connectivity technology: Wired, Interface: USB Type-C. Operating voltage: 5 V