Introduction
Welcome to the user manual for your new Bontempi KeyRhythm 37 Keys Digital Keyboard. This manual provides essential information on setting up, operating, and maintaining your instrument to ensure optimal performance and longevity. Designed for beginners and kids, this keyboard offers a comfortable and precise playing experience with its optimized 2 cm key pitch and various learning functions.
Product Overview
Key Features:
- Advanced Digital Keyboard: 37-key design suitable for all skill levels.
- Optimized Pitch: 2 cm pitch between keys for comfortable and precise playability.
- Headphone Socket: Allows for private practice sessions without disturbing others.
- Integrated Pentagrammed Strip: Facilitates score reading during performance.
- Metronome and Transposer: Tools for timing practice and tone adjustment.
Components:

Figure 1: Top view of the KeyRhythm Digital Keyboard. This image highlights the 37 keys, the control panel with buttons for rhythms, sounds, demo, record, play, volume, and tempo, as well as the integrated speaker on the right.

Figure 2: The KeyRhythm Digital Keyboard alongside its retail packaging. The packaging emphasizes features like 10 demo songs, 8 sounds, 16 rhythms, learning function (OKON), record & play, metronome, and effects like sustain/vibrato. It also shows icons for headphone socket, adapter socket, and external audio source socket.

Figure 3: The KeyRhythm Digital Keyboard displayed with its packaging and the included music stand. This view provides a comprehensive look at what comes in the box, including the keyboard, its packaging, and the detachable music stand for holding sheet music.
Setup
- Unpacking: Carefully remove the keyboard and all accessories from the packaging. Ensure all components are present: keyboard, music stand (if included), and any power cables or adapters.
- Power Source:
- Batteries: The keyboard is battery powered. Locate the battery compartment on the underside of the keyboard. Insert the required batteries (e.g., AA or C, refer to the compartment label for type and quantity) ensuring correct polarity.
- AC Adapter (Optional): If an AC adapter is provided or purchased separately, connect it to the DC IN port on the keyboard and then to a standard wall outlet.
- Music Stand Installation: If a music stand is included, insert its base into the designated slots on the top rear of the keyboard.
- Headphones (Optional): For private practice, plug 3.5mm headphones into the headphone socket located on the keyboard.
- External Audio Source (Optional): To play along with external audio, connect your device to the external audio source socket using an appropriate cable.
Operating Instructions
Basic Operation:
- Power On/Off: Locate the power button (often labeled "STOP" or "ON/OFF") and press it to turn the keyboard on or off.
- Volume Control: Use the "VOLUME" buttons or knob to adjust the overall sound level.
- Tempo Control: Use the "TEMPO" buttons to adjust the speed of rhythms and demo songs.
Functions:
- Sounds (Tones): Press the "SOUNDS" button and then use the numbered keys to select from various instrument sounds (e.g., Piano, Organ, Guitar, Violin, Trumpet, Clarinet).
- Rhythms: Press the "RHYTHMS" button and then use the numbered keys to select from different rhythm patterns (e.g., Rock 1, Disco, March, Waltz, Slow Rock 2).
- Demo Songs: Press the "DEMO" button to play pre-recorded demonstration songs. Use the numbered keys to select a specific demo song.
- Learning Function (OKON): This function assists beginners in learning songs. Refer to the keyboard's specific learning mode instructions (often involves following lighted keys or on-screen prompts).
- Record & Play:
- Record: Press the "REC" button to start recording your performance. Play on the keys.
- Play: Press the "PLAY" button to listen to your recorded performance.
- Metronome: Press the "METRONOME" button to activate a click track for timing practice.
- Transposer: Use the "TRANSPOSER" buttons (often +/-) to shift the pitch of the entire keyboard up or down.
- Sustain: Press the "SUSTAIN" button to add a decaying effect to notes, making them ring out longer.
- Vibrato: Press the "VIBRATO" button to add a slight pitch modulation effect to notes.
Maintenance
- Cleaning: Use a soft, dry cloth to wipe the surface of the keyboard. For stubborn dirt, slightly dampen the cloth with water and a mild soap, then wipe dry immediately. Do not use abrasive cleaners, solvents, or waxes.
- Storage: When not in use, store the keyboard in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: If the keyboard will not be used for an extended period, remove the batteries to prevent leakage and damage.
- Avoid Liquids: Keep liquids away from the keyboard to prevent damage to internal electronics.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound |
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| Keys not responding |
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| Distorted sound |
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Specifications
| Feature | Detail |
|---|---|
| Brand | Bontempi |
| Model Name | 15 3770 |
| Number of Keys | 37 |
| Key Pitch | 2 cm |
| Product Dimensions | 2.13"D x 7.24"W x 2.13"H (54.4 x 18.4 x 5.4 cm) |
| Item Weight | 2.16 pounds (0.98 Kilograms) |
| Power Source | Battery Powered |
| Headphones Jack | 3.5mm Jack |
| Connectivity Technology | Auxiliary |
| Special Features | Headphone Socket, Metronome, Learning Function (OKON), Record & Play, Transposer, Sustain, Vibrato |
| Color | Black |
| Skill Level | Intermediate (suitable for Kids and Beginners) |
Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or visit the official Bontempi website. Keep your proof of purchase for any warranty claims.
For further assistance, you may contact the seller directly through the platform where the product was purchased.