1. Introducción
Thank you for choosing the Momcozy M21FWDB03 White Noise Machine. This device is designed to create a peaceful and soothing environment for sleep, relaxation, and focus, suitable for babies, children, and adults. It features a wide range of high-fidelity sounds, a customizable night light, and smart control via a dedicated mobile application.

Image 1: Momcozy M21FWDB03 White Noise Machine with smartphone showing app interface.
2. Información importante de seguridad
Please read all safety instructions before use and retain for future reference.
- Use the device with caution to avoid any risk of electric shock.
- Keep the device out of reach of children as it is not designed as a toy.
- No exponga el dispositivo al agua ni a la humedad excesiva.
- No intente desmontar ni reparar el dispositivo usted mismo. Si necesita asistencia técnica, póngase en contacto con el servicio de atención al cliente.
- Use only the power cable provided with the device.
3. Contenido del paquete
- Momcozy M21FWDB03 White Noise Machine
- USB Power Cable (Type-C or Micro USB)
- Manual de usuario
4. Producto terminadoview
The Momcozy M21FWDB03 features intuitive controls and a sleek design. Familiarize yourself with the device's components:

Imagen 2: Frente view of the Momcozy M21FWDB03 showing control buttons.
- Superficie superior: Touch-sensitive area for light control (tap to adjust brightness, long press for color change).
- Botones del panel frontal:
- Botón de reproducción/pausa
- Subir volumen (+)
- Bajar volumen (-)
- Sonido anterior
- Siguiente sonido
- Mode/Timer Button (M)
- Panel trasero: Power port (USB Type-C or Micro USB).

Image 3: Visual representation of key features including App Smart Control, 34 Sounds, Night Light & Ambiences, Auto-off Timer, 3.5mm Headphone Jack, Child Lock, Favorite Scenarios, and Program Reminder.
5. Configuración
5.1 Conexión de alimentación
- Connect the provided USB power cable to the power port on the rear of the device.
- Conecte el otro extremo del cable USB a un adaptador de corriente USB compatible (no incluido) o a un puerto USB.
- The device will power on automatically or can be turned on by pressing the Play/Pause button.
5.2 Descarga de aplicaciones y conexión Wi-Fi
To unlock the full potential of your Momcozy White Noise Machine, download the companion app and connect it to your device.
- Ensure your smartphone is connected to a 2.4 GHz Wi-Fi network. (5 GHz networks are not supported for initial setup).
- Download the "Tuya Smart" app from your mobile app store (App Store for iOS, Google Play for Android). You can search for "Tuya Smart" or scan the QR code provided in the app's instructions.
- Open the app and follow the on-screen instructions to register or log in to your account.
- In the app, tap "Add Device" or the "+" icon. Select "Others" then "Others (BLE)" to add the device.
- On the Momcozy device, long-press the "M" (Mode/Timer) button until the indicator light blinks blue, indicating it's in APP pairing mode.
- Confirm the indicator is blinking in the app and proceed. Enter your 2.4 GHz Wi-Fi password when prompted.
- The app will connect to the device. Once connected, the indicator light will stop blinking, and the device will appear in your app.
If the connection fails, please ensure:
- You have correctly entered the Wi-Fi password.
- Your router is connected to the internet and the Wi-Fi signal is functioning.
- Your white noise machine, router, and mobile phone are sufficiently close to ensure a strong signal strength.
- Turn off the white noise machine, then turn it back on and follow the previous steps to reconfigure the network.
Video 1: Instructions on how to connect the Momcozy White Noise Machine (DB03) to your phone via the app.
6. Operating Instructions (Manual Controls)
6.1 Encendido y apagado
Presione el Reproducir/Pausa Botón para encender o apagar el dispositivo.
6.2 Ajuste del volumen
Presione el VOL+ Botón para subir el volumen. Pulse el vol- para bajar el volumen.
6.3 Selección de sonido
The device offers 34 high-fidelity soothing sounds:
- 10 White Noise sounds
- 3 sonidos del ventilador
- 7 canciones de cuna
- 14 Nature sounds
Utilice el Sonido anterior y Siguiente sonido Botones para recorrer los sonidos disponibles.

Image 4: The device offers 11 White Noises, 3 Fan Sounds, 8 Lullabies, and 12 Nature Sounds to help children fall asleep faster.
6.4 Control de luz nocturna
The device features a soft LED night light with 7 colors and adjustable brightness.
- Ajuste de brillo: Tap the top surface of the device to cycle through brightness levels (1%-100% dimmer).
- Cambio de color: Long-press the top surface to switch between the 7 available colors.

Image 5: Soft night light with adjustable brightness via touch controls, ideal for night feedings.

Image 6: The night light offers 16 million colors and soft light to help sleep, assist night feeding, and create atmosphere.
6.5 Función de temporizador
Presione el M button to set a timer for automatic shut-off. The available timer options are typically 30, 60, or 90 minutes. Refer to the app for more advanced scheduling.
7. Control de aplicaciones
The "Tuya Smart" app provides comprehensive control over your Momcozy White Noise Machine, allowing for greater customization and convenience.

Image 7: App interface showing options to customize sound and light, select sound & light, and set programs.
7.1 control remoto
Control all functions (power, volume, sound selection, light brightness, and color) directly from your smartphone, even when you're not in the room.
NUNCA personalización
Personalize your experience by adjusting the color, brightness, sound, and volume levels to create your ideal ambiance.

Image 8: Customize your "Favorite" settings by long-pressing the "M" button to switch ambiance, or via the app.
7.3 Scheduling and Auto-off Timer
Set programs for the device to automatically turn on/off, change sounds, or adjust lights according to your family's sleep schedule or daily routines. This includes wake-up functions.

Image 9: Auto-off Timer and Wake-up Function help to start an energetic day, configurable via the app.
7.4 Bloqueo para niños
Activate the child lock feature through the app to prevent accidental changes by curious little hands.
8. Mantenimiento
To ensure the longevity and optimal performance of your Momcozy White Noise Machine:
- Limpie el dispositivo con un paño suave y seco.
- No utilice limpiadores abrasivos ni disolventes.
- Keep the device free from dust and debris, especially around the speaker grille.
9. Solución de problemas
| Problema | Posible causa | Solución |
|---|---|---|
| El dispositivo no enciende | Sin energía, cable/adaptador defectuoso | Ensure the power cable is securely connected and the power source is active. Try a different USB adapter. |
| No se puede conectar a la aplicación | Incorrect Wi-Fi password, 5GHz network, weak signal, device not in pairing mode | Verify Wi-Fi password. Ensure you are on a 2.4 GHz network. Move device closer to router. Long-press 'M' button to enter pairing mode (blue blinking light). Restart device and try again. |
| Sin sonido | Volume too low, sound paused | Increase volume using VOL+ button or app. Press Play/Pause button. |
| La luz no funciona | Brightness too low, light turned off in app | Tap the top surface to adjust brightness. Check app settings to ensure light is enabled. |
10. Especificaciones
| Característica | Detalle |
|---|---|
| Número de modelo | M21FWDB03 |
| Materiales | Plástico |
| Tipo de energía | Cable eléctrico |
| Requiere pilas | No (1 Lithium metal battery required for internal clock/memory, not user-replaceable) |
| Fabricante | Mamá acogedora |
| Dimensiones del paquete | 15.8 x 11.6 x 11.4 cm |
| Peso del artículo | 340 gramos |
| Tipo de conector | USB Type-C or Micro USB |
| Color | Azul |
11. Garantía y soporte
For any questions, concerns, or support needs, please contact Momcozy customer service:
- PHONE (US): +1-855-322-1777 (Mon-Sun, 8 AM-5 PM, EST)
- CORREO ELECTRÓNICO: soporte@momcozy.com
- ENTAGRAM: https://www.instagram.com/momcozy
- FACEBOOK: https://www.facebook.com/Momcozy4u
Conserve su comprobante de compra para reclamos de garantía.