The SA80 is a great fun way for your children to get involved in music for the first time. With mini keys for small hands and lots of fun sounds and rhythms to play with, your children will love the SA80! Number Of Keys 44 Maximum Polyphony 32 Number Of Tones 100 Songs • Melody Off• 10 Built-in Songs Speaker 8cm x 2 Amplifiers 0.5W + 0.5W Power Supply • 2-way• AC Adaptor: AD95 Adapter (Optional)• Batteries: AA-size alkaline batteries x 6 (Approximately 12 hours continuous operation)• AA-size rechargeable nickel metal hydride batteries x 6 (Approximately 10 hours continuous operation) Power Consumption 3.8W Dimensions 604 x 211 x 57 mm Weight 1.4 kg Effects Reverb (4 levels, off) Layer/Split Yes Octave Shift -1 octave ~ 0 ~ +1 octave Transpose -12 semitones ~ 0 ~ +12 semitones Tuning Control A4 = 415.5 Hz ~ 440.0 Hz ~ 465.9 Hz Scales Equal temperament + 16 variations Metronome Beat bell: Off, 1 to 9 (beats), tempo range: 20 to 255 Other Features • Tone buttons (PIANO, TRUMPET, DRUMS) • Auto Power Off Phones/Output Stereo mini jack