This is coming out of my personal collection, which I'm paring down. Very lightly used, in excellent condition. Body has some very small blemished. Grill is in super clean shape.  I used this primarily in the home studio.

These mics are typically pretty beat on the 2nd hand market up as they were many touring FOH engineer's choice in the 80's and 90's. 

I couldn't find a spec sheet but you can use these anywhere you'd use a SM57 or MD421 in the studio or for live use. Guitar amps, bass cabinets, toms, et al. Frequency range is 50hz - 15,000k.

The sale comes with a new old stock stand adapter clip in original packaging. The storage case is in very good shape, there are small tears forming at the end, typical of these vinyl cases, see pics. Storage case foam integrity is good. Includes the OEM soft drawstring bag. 

The ATM21 is classic well made Japanese workhorse mic for those who know! 

Much cooler and more robustly built than the Made in Mexico SM57 mics or most all of the Chinese made mics of today. 

I pack well and ship fast, often same day!

The desktop mic stand in the photos IS NOT INCLUDED.