Introduction
Thank you for choosing the MOSEN 88-Key Full-Size Portable Foldable Digital Piano Keyboard. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your new instrument. Please read it thoroughly to ensure optimal performance and longevity of your keyboard.
What's in the Box
Your MOSEN 88-Key Digital Piano Keyboard package includes the following items:
- MOSEN 88-Key Semi-Weighted Foldable Digital Piano Keyboard
- Microphone
- Music Stand
- Note Stickers
- USB-C Cable
- Power Adapter
Setup
1. Unboxing and Initial Inspection
Carefully remove all components from the packaging. Inspect the keyboard and accessories for any signs of damage. Keep the original packaging for future transport or storage.
Video: Unboxing the MOSEN Foldable Keyboard. This video demonstrates the unboxing process and initial setup of the keyboard, including how it is packaged and the accessories included.
2. Unfolding the Keyboard
The MOSEN keyboard features a 180-degree folding design for portability. To unfold, gently extend the two halves until they lock into place, forming a full 88-key layout. Ensure the locking mechanism is secure before use.

Image: The MOSEN 88-Key Digital Piano shown in its folded, compact state, highlighting its portability.
Video: First Impressions of the MOSEN Folding Keyboard. This video provides a quick overview of the keyboard's features and demonstrates the unfolding process.
3. Powering On
Connect the keyboard to a power outlet using the provided USB-C cable and power adapter. The keyboard also features a long-lasting internal battery, offering up to 10 hours of continuous playtime on a single charge. Press the 'Power' button to turn the instrument on or off.

Image: The MOSEN 88-Key Digital Piano highlighting its 10-hour portable power, suitable for various locations.
4. Attaching Accessories
- Music Stand: Insert the music stand into the designated slots on the top panel of the keyboard.
- Microphone: Connect the microphone to the microphone input jack on the keyboard's interface.
- Note Stickers: For beginners, apply the included note stickers to the white keys as visual guidance.
Operating Instructions
1. Basic Playback
Press the 'Tone' button to select from 190 realistic tones. Use the '+' and '-' buttons to navigate through the tone options. Similarly, press the 'Rhythm' button to choose from 191 built-in rhythms. The keyboard also features 80 demo songs for listening and learning.
Video: What You Need to Know Before Buying. This video offers an overview of the keyboard's features and sound capabilities.
2. Modes and Functions
- Demo Mode: Press 'Demo One' to play a single demo song or 'Demo All' for continuous playback of all 80 songs.
- Recording Mode: Use the 'Record' function to capture your performances and 'Play' to listen back.
- Lesson Mode: Engage the 'Lesson' function for interactive teaching.
- Dual Keyboard Mode: This mode allows two players to use the keyboard simultaneously, ideal for teaching or duets.
- Metronome: Activate the 'Metronome' for rhythm practice.
- Transpose: Adjust the pitch of the keyboard using the 'Transpose' function.
- Sustain: The 'Sustain' button provides a sustained effect for notes.
- Volume Control: Adjust the overall volume using the dedicated volume buttons.

Image: The MOSEN 88-Key Digital Piano illustrating its dual keyboard mode, metronome, and teaching functions.
3. Connectivity
The keyboard features a USB-C port for charging and data transfer, and a 3.5mm headphone jack for private practice. It also supports external sustain pedals (not included).

Image: A close-up of the MOSEN 88-Key Digital Piano's versatile interface, detailing ports for MP3, MIDI, microphone, audio input/output, sustain pedal, and power.
Key Features
- 88 Semi-Weighted Keys: Provides a responsive playing experience suitable for beginners.
- Foldable Design: Folds to 25.2 inches for easy storage and transport.
- Extensive Sound Library: 190 rhythms, 190 tones, and 80 demo songs.
- Learning Tools: Dual keyboard mode, metronome, and interactive teaching functions.
- Long-Lasting Battery: Up to 10 hours of playtime on a single charge.
- Included Accessories: Microphone, music stand, note stickers, USB-C cable, and power adapter.

Image: An overview of the MOSEN 88-Key Digital Piano's features, including its 88 standard keys, dual keyboard mode, LED display, portability, 180° foldable design, headphone connection, Bluetooth, app teaching, metronome, 190 rhythms, 190 tones, 80 demo songs, record/play function, advanced chip, and microphone.
Maintenance
1. Cleaning
Wipe the keyboard surface with a soft, dry cloth. For stubborn dirt, slightly dampen the cloth with water. Avoid using abrasive cleaners, solvents, or waxes, as these can damage the finish and electronic components.
2. Storage
When not in use, fold the keyboard and store it in a dry, cool place away from direct sunlight and extreme temperatures. Ensure it is protected from dust and moisture.
3. Battery Care
To prolong battery life, avoid fully discharging the battery frequently. Charge the keyboard regularly, even if not in constant use, to maintain battery health.
Troubleshooting
- No Sound: Check if the volume is turned up. Ensure headphones are not plugged in if you intend to use the internal speakers.
- Keys Not Responding: Verify the keyboard is powered on and fully unfolded with the locking mechanism engaged.
- Sound Distortion at High Volume: The built-in speakers may distort at maximum volume levels. Reduce the volume or connect external speakers/headphones for clearer sound.
- Limited Dynamic Control: This keyboard is designed with semi-weighted keys for beginners. Advanced dynamic control may not be as nuanced as higher-end professional pianos.
- Microphone Quality: The included microphone is basic. For higher quality audio input, consider using a professional microphone with an appropriate adapter if needed.
- Missing Advertised Features (e.g., MIDI, Bluetooth): Some units may vary in features. Please refer to the product packaging or contact customer support for clarification on specific functionalities.
- Difficulty with Function Selection: Some functions require multiple presses of the '+' or '-' buttons to cycle through options. Refer to the quick start guide for specific button sequences.
Specifications
| Feature | Detail |
|---|---|
| Model Number | MS001 |
| Number of Keys | 88 |
| Key Type | Semi-Weighted |
| Folded Length | 25.2 inches |
| Item Weight | 7.8 pounds (approx. 3.5 kg) |
| Dimensions (Package) | 28.5 x 12.5 x 6.5 inches |
| Tones | 190 |
| Rhythms | 191 |
| Demo Songs | 80 |
| Battery Life | Up to 10 hours |
| Connectivity | USB-C, 3.5mm Headphone Jack |
| Power Source | Corded Electric (via USB-C) |
| Material Type | Plastic |
| Color | Black |
Warranty and Support
MOSEN MUSIC is committed to providing excellent customer service. If you encounter any issues with your keyboard after receiving it or during use, please do not hesitate to contact our after-sales customer service team. We are available to assist you with any problems or questions you may have.
For support, please visit our official website or refer to the contact information provided in your product packaging.