Logitech 989-000171. Type: Table microphone, Microphone sensitivity: 28 dB, Microphone frequency: 100 - 11000 Hz. Connectivity technology: Wireless, Device interface: Bluetooth/3.5 mm, Maximum operating distance: 334.6" (8.5 m). Product color: Black, Compatible products: Logitech Group. Height: 0.827" (21 mm), Diameter: 3.27" (8.3 cm), Microphone weight: 8.11 oz (230 g). Package width: 3.74" (95 mm), Package depth: 7.68" (195 mm), Package height: 1.61" (41 mm)