1. Introduction
Thank you for choosing the FingerBallet BX20 Portable 88-Key Folding Digital Piano. This instrument is designed to provide a realistic piano playing experience with the convenience of portability. Its semi-weighted keys, extensive sound library, and versatile connectivity options make it suitable for various musical applications, from practice to performance. Please read this manual thoroughly to understand the features and ensure proper operation and maintenance of your digital piano.
2. Package Contents
Please verify that all items listed below are included in your package. If any items are missing or damaged, please contact customer support.
- FingerBallet BX20 Digital Piano (x1)
- Carrying Bag (x1)
- Music Holder (x1)
- Book Clip (x1)
- Note Sticker (x1)
- Power Adapter (x1)
- USB Cable (x1)
- Sustain Pedal (x1)
- Headphones (x1)
- User Manual (x1)

Image: All components included in the FingerBallet BX20 package, including the folding piano, carrying bag, music holder, sustain pedal, power adapter, USB cable, headphones, note stickers, and book clip.
3. Product Features
- 88 Semi-Weighted Keys: Provides a realistic playing feel with touch sensitivity for expressive dynamics.
- Foldable Design: The piano folds in half for easy transport and compact storage, making it ideal for travel and small spaces.
- Extensive Sound Library: Features 128 tones and 128 rhythms, allowing exploration of various musical styles.
- MIDI & Bluetooth Connectivity: Connects wirelessly via Bluetooth MIDI to mobile devices for use with DAW software and music apps, or via USB MIDI for wired connections.
- Built-in Battery: High-capacity rechargeable battery enables playing without a power outlet, suitable for outdoor performances or practice on the go.
- Integrated Functions: Includes 20 demo songs, metronome, and record & play functions for practice and composition.

Image: The FingerBallet BX20 digital piano in its folded, compact state, demonstrating its space-saving design.

Image: A detailed view of the semi-weighted keys, illustrating their touch-sensitive response across low to high ranges.

Image: The FingerBallet BX20 digital piano connected to a tablet, showcasing its MIDI functionality with various music applications like Garageband and Pop Piano.
4. Setup
- Unfolding the Piano: Carefully unfold the piano until it locks into its full 88-key position. Ensure the hinge mechanism is securely engaged.
- Power Connection: Connect the power adapter to the DC 5V port on the piano and plug it into a wall outlet. Alternatively, the built-in battery allows for wireless operation.
- Sustain Pedal: Plug the sustain pedal into the designated pedal input jack.
- Music Holder: Insert the music holder into the slot on the top panel of the piano.
- Headphones (Optional): For private practice, connect headphones to the 3.5mm headphone jack.

Image: The FingerBallet BX20 digital piano fully unfolded and placed on a keyboard stand, ready for use.
5. Operating Instructions
5.1 Power On/Off
- Press and hold the Power button to turn the piano on or off.
5.2 Volume Control
- Use the Volume Up (+) and Volume Down (-) buttons to adjust the master volume.
5.3 Tone Selection
- Press the Tone button, then use the number keys or arrow buttons to select from 128 available tones.
5.4 Rhythm Selection
- Press the Rhythm button, then use the number keys or arrow buttons to select from 128 available rhythms.
5.5 Demo Songs
- Press the Demo button to cycle through the 20 built-in demo songs. Press again to stop playback.
5.6 Metronome
- Press the Metronome button to activate the metronome. Use associated controls (if available) to adjust tempo and beat.
5.7 Record & Play
- Press the Record button to begin recording your performance.
- Press the Play button to listen to your recorded track.

Image: A user engaging with the FingerBallet BX20, highlighting its various functions such as 128 tones, 128 polyphony, 21 demos, MIDI, record & play, and metronome.
6. MIDI and Bluetooth Connectivity
The FingerBallet BX20 offers versatile connectivity options for integration with other devices and software.
6.1 Bluetooth MIDI Connection
The piano can function as a wireless MIDI controller, allowing you to connect to music production software (DAW) or learning apps on your mobile device (smartphone, tablet) or computer.
- Ensure Bluetooth is enabled on your mobile device or computer.
- Turn on the FingerBallet BX20. The Bluetooth indicator (if present) may flash.
- Open your desired music app or DAW. Look for MIDI device settings within the app.
- Select the FingerBallet BX20 from the list of available Bluetooth MIDI devices to establish a connection.
6.2 USB MIDI Connection
For a wired connection to a computer, use the provided USB cable.
- Connect one end of the USB cable to the USB port on the piano and the other end to your computer.
- The piano will be recognized as a MIDI device by your computer's operating system.
- Open your music software and select the FingerBallet BX20 as your MIDI input device.

Image: An illustration depicting the Bluetooth MIDI connectivity of the piano with a laptop, tablet, and smartphone, enabling wireless control of music applications.
7. Maintenance
- Cleaning: Use a soft, dry cloth to wipe the surface of the piano. For stubborn dirt, slightly dampen the cloth with water and a mild soap, then wipe dry immediately. Avoid abrasive cleaners or solvents.
- Storage: When not in use, fold the piano and store it in its carrying bag in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. If storing for an extended period, charge the battery to approximately 50% every few months.
- Handling: Always handle the piano carefully, especially when folding or unfolding, to prevent damage to the keys or hinge mechanism.
8. Troubleshooting
- No Sound:
- Check if the piano is powered on.
- Ensure the volume is not set to minimum or muted.
- If headphones are connected, ensure they are fully plugged in and functioning.
- Keys Not Responding:
- Restart the piano.
- Ensure no foreign objects are lodged between the keys.
- Bluetooth MIDI Connection Issues:
- Ensure the piano is within range of your device.
- Turn Bluetooth off and on again on your device.
- Restart both the piano and your device.
- Check if the music app's MIDI settings are correctly configured to recognize the piano.
- Power Issues:
- If using the power adapter, ensure it is securely connected to both the piano and a working power outlet.
- If using battery power, ensure the battery is sufficiently charged.
9. Specifications
| Brand | FingerBallet |
| Model Name | BX20 |
| Number of Keys | 88 |
| Key Type | Semi-Weighted, Touch-Sensitive |
| Tones | 128 |
| Rhythms | 128 |
| Demo Songs | 20 |
| Connectivity | Bluetooth MIDI, USB MIDI |
| Power Source | Battery Powered (1 Lithium Polymer battery included), DC 5V Adapter |
| Headphones Jack | 3.5mm Jack |
| Item Weight | 12.4 pounds |
| Unfolded Dimensions | 49.8 x 8.2 x 2.4 inches (approx.) |
| Folded Dimensions | 24.9 x 8.2 x 4.8 inches (approx.) |

Image: Visual representation of the FingerBallet BX20's dimensions, showing its length, width, and height when unfolded and its compact size when folded.
10. Warranty and Support
The FingerBallet BX20 Portable 88-Key Folding Digital Piano comes with a One-year Service Agreement. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or normal wear and tear.
For warranty claims, technical support, or any questions regarding your product, please contact FingerBallet customer service through the retailer where you purchased the product or visit the official FingerBallet website for contact information.
Please retain your proof of purchase for warranty validation.