Due to it's little key width of 18 mm (medium keyboard) this instrument is in particular adequate for children and adolescents. It is an accordion with three reed ranks which is favoured by music schools and hobby musicians for it's powerful sound, light weight and the medium keyboard. The bass side possesses a deminished seventh row. Included are hard case and shoulder straps. Color: Green.SpecsKeys Treble Side: 30Buttons Bass Side: 72Reed Ranks Treble Side: IIIReed Ranks Bass Side: IIIRegisters Treble Side: 5Registers Bass Side: -Range Treble Side: g - c'''Range Bass Side: C - d' #Weight: 6,2 kg / 13,7 lbsDimensions H x D: 332 x 182 mmKey width: Medium - 18 mmInclusive: Case and Straps