The Bitbox micro have 8 pads for sounds, loops and samples, the samples streams direct from the sd card and can be played by midi or the 8 triggers inputs on frontpanel), theres a build in filter, delay and reverb + cc control ...the Big Bitbox have 16 pads but only a stereo out, the micro have 6+2 outputs for process the 8 sounds further trough other modules ..,some buyers wrote module goes hot .. i dont have any problem that the module is to warm, i use it in a Behringer eurorack go case, which have a good power supply ... tip: buy a big fast micro sd card for huge sample collections or audio playback you also can record and slice loops .. highly Recommended!