Dell Mobile Adapter Speakerphone (470-AELP) - Dimension: 119mm x 32mm, Connectivity: 1 x USB-C, 1 x HDMI, 2 x USB-A, Speaker Type: 200Hz - 20kHz, Features: Answer an incoming call, End current call, Reject an incoming call, Mute/Un-mute, Volume +/-, Operating Systems: Win10 64 Bit