Compact unit. Easily mounted to an existing setup. Expandable memory and four extra trigger inputs. The alesis samplepad pro is perfect for home production small gigs and adding an array of electronic sounds to your acoustic setup. Featuring eight dual zone pads the alesis samplepad pro has 10 built in kits and 200 drum and percussion sounds. Thats great for getting set up and playing quickly. However it also accepts up to 32gb of sd card storage space allowing you to store an additional 89 user kits and 512 samples per card. So you can have all of your essential sounds ready to play wherever you are. With usb midi connectivity you can also hook the samplepad pro up to your own vst and recording software. Perfect for producing music in your home studio. Comes complete with alesis multipad clamp for integrating with your drum kit by attaching to any cymbal stand.