Logitech Expansion Microphone. Type: Table microphone, Microphone sensitivity: 28 dB, Microphone frequency: 100 - 11000 Hz. Connectivity technology: Wireless, Device interface: Bluetooth/3.5 mm, Maximum operating distance: 8.5 m. Product colour: Black, Compatible products: Logitech Group. Height: 21 mm, Diameter: 8.3 cm, Microphone weight: 230 g. Package width: 95 mm, Package depth: 195 mm, Package height: 41 mm