The Azden HS-9 Omni-Directional Headset Microphone is a versatile microphone with a wired mini-jack (3.5mm) that is compatible with Azden body pack transmitters. This electret condenser microphone requires a bias voltage of 2-10VDC, which is provided by the transmitters. The microphone is designed to be lightweight and unobtrusive, offering comfort and functionality for the user. It is an omni-directional microphone with the mic element placed close to the mouth for optimal sound quality. The microphone is suitable for use with Azden PRO Series, 15BT, and 35BT wireless transmitters. The product dimensions are 20 x 2.5 x 15 cm and it weighs 45g. The item model number is AZDHS-9 and it is manufactured by C.R. Kennedy. The microphone comes with guaranteed software updates, but the duration of these updates is unspecified.