It´s a premium headworn microphone that is ideal for lead and backing vocals on stage and for live recording applications.
How does this compare to the BETA53?
Both mics look similar, using the same ultra thin design. The Beta53 has a flat response and is omnidirectional, making it more suitable for spoken word in quieter environments, whereas the BETA54 has a tailored response and is supercardioid, making it more suitable for vocals in loud environments such as on stage.
This microphone is also available wireless - see WBH54