Casio CTK-1250 Keyboard - 61 normal keys, 12-note polyphony, 100 sounds, 100 styles, 50 internal songs, transposer, reverb, chorus, lession function, LCD display, connection: headphone (stereo mini jack), 2x 2W speakers, powered via batteries or power supply ( power supply is not included, optionally #252463), dimensions: 949 x 304 x 93mm, weight: 3.3kg ( identical in construction to CTK-1150)