One side is softer for practicing timpani, the other side for use with snare sticks. Neither side is very loud. Meant to be used at home or backstage.
Each side acts as a skid-resistant bottom for the other so when placed on a table it will stay in place.

There is a 7/16”(11mm) by 8” slot on each side intended to be used as a cell phone or iPad holder so you can watch YouTube instead of practicing.
Not guaranteed to fit everyone’s cell phone because of the millions of varieties of cases but it should fit most thin cases.

The playing area onboth sides is 11” x 7”. The pad is about 1.5” thick, 8.5” tall, and 12.5” wide. Weighs 2.5-3lbs.