CTK-496 Technical Specifications :: - Keyboard 61 Standard-size keys, 5 Octaves - Tones 100 - Polyphony 12 Notes Maximum (6 for Certain Tones) - Auto Accompaniment Rhythm Patterns 100 - Tempo Variable (236 Steps, ? = 20 to 255) - Chords 2 Fingering Methods (Casio Chord, Fingered) - Rhythm Controller Start/Stop, Synchro/Fill-in - Accompaniment Volume 0 to 9 (10 Steps) - Song Bank Tunes 100 - Controllers Play/Pause, Stop, Rew, FF, Left On/Off (ACCOMP), Right On/Off (MELODY) - Display Name Display Tone, Rhythm, Song Bank Name/Number, Keyboard Settings Name/Value - Tempo Tempo Value, Metronome, Synchro Standby, Beat Indicator, Volume Setting - Chord Chord Name, Chord Form - Fingerings Fingering Indicators, Parts - Song Bank Status Play, Pause, Rew, FF - Staff 5 Octaves with Sharp and Flat Indications, Pedal Symbol, Octave Symbol - Keyboard 5 Octaves - MIDI 5 Multi-timbre Receive - Other Functions Transpose 12 Steps (-6 Semitones to +5 Semitones) - Tuning Variable (A4= Approximately 440.0Hz ±50 cents) - Volume 0 to 9 (10 Steps) - Terminals MIDI Terminals In, Out - Sustain Terminal Standard Jack - Phones/Output Terminal Standard Standard Jack (Output is Monaural) - Output Impedance: 78? - Output Voltage: 4V (RMS) MAX - Power Supply Terminal 9V DC - Microphone In Standard Jack (with Microphne Volume Knob) - Input Impedance: 40k? - Input Sensitivity: 10mV - Power Supply Dual Power Supply System - Batteries 6 AA-size Batteries - Battery Life Approximately 4 hours Continuous Operation on Alkaline Batteries - Approximately 2 hours Continuous Operation on Manganese Batteries - AC Adaptor AD-5 (Optional) - Auto Power Off Turns Power Off Approximately 6 minutes after Last Key Operation. Enabled under Battery Power Only, can be Disabled Manually. - Speaker Output 2.0W + 2.0W - Power Consumption 9V - 7.7W - Dimensions 37 11/16 x 13 15/16 x 5 3/16 inches (95.6 x 35.4 x 13.2 cm) - Weight Approximately 8.4 lbs (3.8kg) without batteries