Boss GM-800 Guitar Synthesizer, Guitar and Bass Synthesizer, Next-generation guitar and bass synthesizer with newly developed serial GK interface, Roland ZEN-Core synthesizer sound engine, Natural playing feel and reliable tracking stability thanks to powerful DSP, Over 1200 tones and 70 rhythm sounds, 150 User scenes, A total of over 90 effect types available in each scene, Serial GK expansion jack for connecting an additional BOSS guitar synthesizer, USB audio/MIDI connection and standard MIDI input and output, Also works as a stand-alone synth sound module for MIDI keyboard or DAW sound expansion, Edit scenes and organise sounds on computer with BOSS Tone Studio, Display: Graphic LCD 256 x 80 pixels, Controls: 1 - 4, Select, Output Level, Push buttons: Part 1 - 4, Part R, Exit, Write, Menu, Page Left and Right, Foot switch: Scene Up, Scene Down, CTL 1, CTL 2, LED: Scene Up, Scene Down, CTL 1, CTL 2, Current consumption: 840 mA, Power supply with a 9 V DC mains adapter (included), Dimensions: (W x D x H): 246 x 134 x 63 mm, Weight: 1200 g@+*Connections:*, GK input and output: 2 x 6.3 mm stereo jack (only for BGK cable), Output L / headphones: 6.3 mm stereo jack, Output R / mono: 6.3 mm stereo jack, CTL3 and 4 / Exp 1: 6.3 mm stereo jack, CTL5 and 6 / Exp 2: 6.3 mm stereo jack, USB B, MIDI input and output, Power supply connection: Barrel connector 5.5 x 2.1 mm, centre negative@+*Note -* Required for operation: A split pickup from the GK series (Boss GK-5 Guitar Synth Pickup, Art.#571644# or Boss GK-5B Bass Synth Pickup, Art.#571646#) - not included, A 6.3 mm stereo jack cable (Boss BGK-15 Serial GK Cable, Art.#571693# or BGK-30 Serial GK Cable, Art.#571697#) - not included