Introduction
The Hotmoon Cocoon 2 Sleep Sound Machine is designed to enhance your rest and focus with a variety of soothing sounds and ambient lighting. This device features advanced dual-speaker technology and intuitive controls for a personalized audio experience.
Key features include:
- 40 High-Quality, Non-Looping Sounds: A diverse selection including 10 fan sounds, 10 nature tracks, 10 lullabies, and 10 ambient noises (White, Pink, Brown, Green noise).
- Upgraded Dual-Speaker Design: Delivers richer bass, wider frequency response, and lower distortion for superior audio performance.
- 8 Calming Night Light Colors: Soft, eye-friendly lighting options to create an ideal ambiance. Can be used independently or with sounds.
- 4 Timer Options: Choose from 45 minutes, 90 minutes, 8 hours, or continuous play for uninterrupted use.
- Effortless Operation: Intuitive buttons and a memory function that recalls your last settings for convenience.
Setup
- Unboxing: Carefully remove the Hotmoon Cocoon 2 Sound Machine and its accessories from the packaging. Ensure all components are present: the sound machine unit and the 4.9ft Type-C power cable.
- Power Connection: The Cocoon 2 is designed for plug-in use only and is not rechargeable. Connect the provided USB Type-C cable to the USB-C port on the back of the sound machine. Plug the other end of the cable into a compatible USB power adapter (not included). A 5V/1A adapter is recommended.
- Placement: Place the sound machine on a stable, flat surface. For optimal sound distribution, avoid placing it in enclosed spaces. Keep the device at least 3 feet (0.9m) away from a baby's crib to prevent strangulation hazards from the power cord.
- Initial Power On: Once connected to power, the device will typically enter standby mode or power on automatically. The backlit buttons will illuminate briefly.

Operating Instructions
Button Functions:
The Hotmoon Cocoon 2 features intuitive touch buttons on its top panel. The backlit buttons automatically deactivate after 30 seconds of inactivity to maintain a calm environment. Touch any button to reactivate them.
- Power Button (⏻):
- Touch to turn the device on/off.
- Touch and hold for 5 seconds to force a complete shutdown.
- Sound Category Buttons:
- Noise Sounds: Cycles through 10 different noise sounds (e.g., White, Pink, Brown, Green noise).
- Fan Sounds: Cycles through 10 different fan sounds.
- Nature Sounds: Cycles through 10 different nature tracks (e.g., Rain, Ocean, Forest).
- Baby Melodies: Cycles through 10 different lullabies and soothing melodies.
- Repeatedly pressing a sound category button will cycle through the available sounds within that category.
- Volume Control (🔉 / 🔊):
- Volume Down (🔉): Decreases the volume. Touch and hold to continuously decrease.
- Volume Up (🔊): Increases the volume. Touch and hold to continuously increase.
- There are 32 adjustable volume levels.
- Light Button (💡):
- Touch to cycle through 8 night light colors and modes (e.g., warm white, red, orange, green, blue, purple, color-changing).
- Touch and hold to turn the light off completely.
- Timer Button (🕒):
- Touch to select a timer duration: 45 minutes, 90 minutes, 8 hours, or continuous play (indicated by "ON").
Memory Function:
The device remembers your last sound, volume, light setting, and timer selection. When you turn the unit back on, it will resume with your previously chosen settings.

Product Features
40 Soothing Non-Looping Sounds
The Cocoon 2 offers an extensive library of 40 high-fidelity, non-looping sounds to prevent auditory fatigue and ensure continuous relaxation. These include:
- 10 Fan Sounds: Various fan types for consistent ambient noise.
- 10 Nature Tracks: Immerse yourself in natural environments like rain, ocean waves, or forest sounds.
- 10 Lullabies: Gentle melodies perfect for babies and adults seeking calming tunes.
- 10 Ambient Noises: Includes classic color noises such as White Noise (for noise canceling), Pink Noise (for winding down), Brown Noise (for sound sleep), and Green Noise (for deep focus).


Upgraded Dual-Speaker Design
Experience superior audio quality with the Cocoon 2's enhanced dual-speaker and passive radiator design. This configuration provides a wider frequency response, reduced distortion, and richer bass, ensuring a clear and immersive sound experience for sleep, meditation, or masking distractions.

8 Calming Night Lights
Create the perfect visual ambiance with 8 soft, eye-friendly night light colors. These lights can be used in conjunction with sounds or independently, offering flexibility for various settings such as a nursery, yoga practice, or simply creating a peaceful sleep environment.

Flexible Timer Options
The Cocoon 2 offers four convenient timer settings to suit your needs: 45 minutes, 90 minutes, 8 hours, or continuous play. This ensures uninterrupted rest or focus without needing manual intervention, making it ideal for adults, students, and professionals.

Maintenance
- Cleaning: Use a soft, dry cloth to wipe the exterior of the sound machine. Do not use liquid cleaners or abrasive materials, as these may damage the device.
- Storage: When not in use for extended periods, unplug the device and store it in a cool, dry place away from direct sunlight and moisture.
- Handling: Avoid dropping the device or subjecting it to strong impacts, which could cause internal damage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Not properly connected to power or faulty adapter. | Ensure the USB-C cable is securely plugged into both the device and a working power adapter. Verify the power adapter is functional. |
| No sound or low volume. | Volume is too low or muted. | Press the Volume Up (🔊) button to increase the volume. Ensure the device is not muted. |
| Night light is not working. | Light function is turned off or set to a very dim level. | Press the Light (💡) button to cycle through modes or turn it on. |
| Device turns off unexpectedly. | Timer function is active. | Check the Timer (🕒) setting. If continuous play is desired, select the "ON" option. |
Specifications
- Model Name: Sleep Sound Machine
- Brand: Hotmoon
- Product Dimensions: 4.92 x 4.57 x 4.92 inches
- Item Weight: 13.76 ounces
- Color: Light Gray
- Material: Plastic
- Power Source: Corded Electric (USB Type-C)
- Input: DC 5V=1A
- Wattage: 5W (Max)
- Loudness: 100dB (Max)
- Working Temperature: 0°C - 40°C
- Rated Useful Luminous Flux: 8lm (Max)
- Rated CRI: 80
- Date First Available: January 4, 2026
- ASIN: B0G2XJ4856
Warranty and Support
For any product inquiries, technical support, or warranty claims, please contact Hotmoon customer service. Refer to the original purchase documentation for specific warranty details.
Contact Support: support@hotmoon.com
Visit the Hotmoon Store: Hotmoon Store on Amazon
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