Casio CTK-240 49-Key Portable Keyboard

Product ID: 87676

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  • 49 standard keys offer the ideal playing surface for beginners to learn on
  • 12-note polyphony for accurately practising chord shapes
  • 100 voices to choose from to enhance your playing experience
  • 100 rhythms to select to play along or practise with
  • 50 preset songs to play along with and hone your improvisational skills
  • Pair of 1.6-Watt speakers offer a substantial audio output
  • Headphone socket allows you to practise in silence
  • LCD display allows you to easily scroll through presets and functions
  • Can be powered by either 6 AA-batteries or power supply (not supplied)


The Casio CTK-240 49-Key Portable Keyboard is ideal for beginners who want an easy to play model for honing their skills on. The 49 standard-sized keys boast 12-note polyphony offering the perfect combination of spacing and accuracy for practising arpeggios and chords. With a plethora of built-in effects, rhythms, and preset songs, there's an arsenal of features to play along with, practise your improvisational skills, and hone your playing technique.

Piano-style keys

The keyboard of the CTK-240 is equipped with 49 full-size keys that match the dimensions of those on an acoustic piano. With a four-octave range at your disposal, developing correct technique can be done accurately. For students who want an affordable instrument to practise on at home or take on their travels with, the CTK-240 is a perfect choice.

Built-in Sound Library

The Casio CTK-240 is equipped with 100 timbres and 100 rhythms that allow you to get creative when you practise or perform. The rhythm patterns offer tempo adjustment across 236 steps from 20 to 255. There are 50 practise pieces that allow you to perfect your improvisational skills and perform with accompaniment, with controls that include Play/Pause, Stop, Melody On/Off. The LCD display allows you easily see which presets have been selected, including Name display - Tone, Rhythm, Song Bank name/number, keyboard setting names/values -, Tempo - Tempo value, metronome, synchro standby, beat indicator -, Chord name, and Song Bank Status.

Additional functions include the ability to transpose by up to 12 steps (6 semitones to +5 semitones), tuning, and volume.

Audio output

The Casio CTK-240 49-Key Portable Keyboard boasts a pair of 1.6-Watt speakers, as well as a headphone output for practising in silence at your leisure. The keyboard weighs a mere 2.8kg, making it easy to pick up and take with you wherever you go. The CTK-240 can be powered either by a power supply or 6 AA-sized batteries (both are optional).

ModelCTK-240 49-Key Portable Keyboard
Dimensions (H x W x D) 75 x 914 x 237 mm (2 15/16 x 36 x 9 5/16 inches)
WeightApproximately 2.8 kg (6.2 lbs) (without batteries)
Keyboard49 standard-size keys, 4 octaves
PolyphonyMax. 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 Output100mm × 2 (1.6 W + 1.6 W)
Power Consumption9.5 V – 5.0 W

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