PRODUCT DESCRIPTION 
 
The CTK-240 features 49 standard keys, making it the ideal CASIO starter instrument for all beginners. 100 tones, 100 rhythms and 50 songs are perfect for instructive yet fun music lessons.
 
49 standard keys
12-note polyphony (max.)
100 timbres
100 rhythms
50 practice pieces
LC display
Speakers: 2 x 1.6 W
Power supply: power supply unit or 6 size AA batteries (both are optional)
 
Technical Specifications
Keyboard
49 standard-size keys, 4 octaves
Tones
100
Polyphony
Max. 12-tone (6-tone for certain tone qualities)
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
Accomp Volume: 0 to 9 (10 steps)
Song Bank
Tunes: 50
Controllers: PLAY/PAUSE, STOP, MELODY ON/OFF
Display
Name display: TONE, RHYTHM, SONG BANK name/number, keyboard setting names/values
Tempo: Tempo value, metronome, synchro standby, beat indicator
Chord: Chord name
Song Bank Status: PLAY, PAUSE, MELODY ON/OFF
Other Functions
Transpose: 12 steps (6 semitones to +5 semitones)
Tuning: Variable (A4 = approximately 440Hz ±50 cents)
Volume: 0 to 9 (10 steps)
Terminals
Phones/Output Terminal: Stereo standard jack (Output is monaural.)
Output Impedance: 78 Ω
Output Voltage: 1.9V (RMS) MAX
Power Supply Terminal: 9.5V DC
Power Supply
Dual power supply system
Batteries: 6 AA-size zinc-carbon batteries or alkaline batteries
Battery Life: Approximately 6 hours continuous operation on zinc-carbon batteries
AC Adaptor: AD-E95100L
Auto Power Off: Turns power off approximately 6 minutes after last operation.
Speaker Output
10 cm × 2 (1.6 W + 1.6 W)
Power Consumption
9.5 V – 5.0 W
Dimensions
91.4 × 23.7 × 7.5 cm (36 × 9 5/16 × 2 15/16 inch)
Weight
Approximately 2.8 kg (6.2 lbs) (without batteries)