The Roland Boutique TB-03 Module with K-25m Keyboard is a special bundle that features both the TR-09 Module and the accompanying K-25M keyboard allowing you to play the module as a stand-alone unit. This bundle allows you to play directly from the TR-09 without requiring an external MIDI device. The Roland Boutique TB-03 Bass Line is a development of the famous TB-303 Bass Line Synth. With the same layout and controls the TB-03 works just like the original. Upgrades include the all-new LED display to provide an enhanced programming experience and a wealth of new rotary controls to provide further access to essential controls.