32 mini keys, 100 sounds, 50 rhythms, 10 songs, and 32 polyphonic voices make up the Casio SA51 mini keyboard. Display Attachments: Stereo headphone output, 3.5 mm Power outlet; appropriate power supply: AD-E95100L; delivery is not included. Six AA batteries are needed for battery operation; these are not included in the delivery. Output of the loudspeakers: two 0.5 W Weight: 1 kg; dimensions (W x D x H): 446 x 208 x 51 mm