Special Features:

Over the head head band, two receivers and microphone boom, microphone boom adjustable length; flexible and adjustable in any direction microphone eletret, bidirectional device filteredfor rf immunity; cable is 2.9 meters in length, terminated in two 3.5mm audio plugs, in line control has volume adjustment and microphone mute capability

Properties:

An item consisting of a loudspeaker and a microphone housed in a common case. It may or may not include electronic circuitry to control its operation. Transmit-receive switching may be controlled by automatic, manual or remote operation. For a loudspeaker used as a microphone, see loudspeaker, (as modified).