Alesis Product OverviewThe Alesis SamplePad 4 is an all-in-one percussion and sample-playing instrument.The Alesis SamplePad 4 is an all-in-one percussion and sample-playing instrument. It comes equipped with four responsive, LED-illuminated rubber pads, dual zone trigger input, and 10 preset kits. With a built-in library of the most commonly requested percussion and electronic drum sounds and the ability to load samples, the only limit is your imagination. For even more flexibility, you can tune and add reverb to your sounds. Intuitive navigation makes it easy to browse through your kits and you can drag and drop your samples via USB on a Mac or PC without removing your SD card. The bright blue LED lighting is clearly visible in every setting.