Boss GKC-AD GK Converter, AD Converter, Converts analogue 13-pin GK pickups to the newly developed Serial GK digital interface, Allows the Serial GK input of BOSS guitar synthesizer products to be controlled with the Serial GK interface from a Roland GK-3 or GK-3B Divided Pickup or an instrument equipped with a 13-pin GK output, Instrument output for routing normal guitar/bass pickup sounds embedded in the 13-pin connector, Connection for power supply: Barrel plug, 5.5 x 2.1 mm, centre negative, Current consumption: 240 mA, Power via a DC power supply unit (included in the scope of delivery), Dimensions: (W x D x H): 115 x 92 x 36 mm, Weight: 340 g