Serial number is valid and can be checked on shure website. Shure SM7B Cardioid Dynamic Vocal Microphone is the perfect choice for studio recording. Designed to capture crystal-clear vocals, this microphone features an integrated pop filter and a dynamic transducer type. With a polar pattern of cardioid, it effectively picks up sound from the front and reduces ambient noise from the sides and rear. This microphone by Shure has a form factor of a dynamic microphone and weighs 2.75 lbs. It comes in black color and has a mount type of none. The connectivity is wired and it is suitable for studio recording. This model also has features such as an integrated pop filter and a polar pattern of cardioid.