Roland FR-4 X BK, Compact V-Accordion with Piano Keyboard, 37 Treble keys and 120 bass keys, Compact housing with low weight, Sound generation and user interface of the flagship FR-8x, Headphone and line outputs, 100 Accordion sound sets (67 presets), 162 Orchestral and 32 organ sounds, 3 Drums sets, Integrated chorus, reverb and rotary effects, Integrated audio recorder, Quick and accurate response thanks to bellows pressure-sensing circuit, Adjustment screw for the desired bellows' inertia, Powerful, internal amplifier system (2 loudspeakers + 1 tweeter), Speaker 2x11 W, Easy-to-read LC display, 4 Expansion slots for more sound variety (Balkan and Dallapé extensions are already pre-installed), FR-4x editor for convenient programming, USB Port and MIDI in/ out, USB Port for playing and recording audio files, Power supply or 10 AA batteries, Dimensions (W x D x H): 481 x 270 x 430 mm, Weight: 8.9 kg (without belt and batteries), Colour: Black, Incl. Power supply PSB-7U