Introduction
This manual provides essential instructions for the setup, operation, maintenance, and troubleshooting of your Sony ULT Field 3 Wireless Portable Bluetooth Speaker. Please read this manual thoroughly before using the product to ensure correct and safe operation. Keep this manual for future reference.
Setup
Unpacking and Contents
Carefully remove all items from the packaging. Ensure the following components are present:
- Sony ULT Field 3 Wireless Portable Bluetooth Speaker
- USB Type-C® Cable
- Strap belt
Charging the Speaker
Before initial use, fully charge the speaker. Use the provided USB Type-C® cable to connect the speaker to a compatible USB power source.

Image: Rear view of the Sony ULT Field 3 speaker with the protective flap open, revealing the USB Type-C charging port and battery indicator.
- A full charge provides up to 24 hours of playback.
- Quick charging provides up to 120 minutes of playback from just 10 minutes of charging.
- The Battery Care function helps prevent overcharging, extending battery lifespan.
Bluetooth Pairing
To connect your speaker to a Bluetooth device:
- Power on the speaker. The Bluetooth indicator will flash.
- On your device (smartphone, tablet), enable Bluetooth and search for available devices.
- Select "ULT Field 3" from the list of devices.
- Once connected, the Bluetooth indicator will stop flashing and remain lit.
For Android devices, Fast Pair enables quick and effortless pairing with a single tap.
Multipoint Connection
The ULT Field 3 supports simultaneous connection with two Bluetooth devices. The speaker will automatically switch between devices when a call is received or playback is initiated on either device.
Operating Instructions
Power On/Off
Press the Power button located on the top panel to turn the speaker on or off.

Image: Top control panel of the Sony ULT Field 3 speaker, displaying various function buttons including Power, Bluetooth, and ULT.
ULT Button Function
Press the ULT button on the control panel to activate enhanced bass and sound pressure. Press it again to cycle through different sound modes or deactivate the feature.
Audio Playback Controls
- Press the Play/Pause button to start or pause audio playback.
- Use the + and - buttons to adjust the volume.
Party Connect
To synchronize music across multiple compatible speakers:
- Ensure all speakers are powered on.
- Press the CONNECT button on each speaker.
- The speakers will link up, playing synchronized audio. Up to 100 compatible speakers can be connected.

Image: An arrangement of several Sony ULT Field 3 speakers and other audio equipment in a room, illustrating the Party Connect feature for synchronized sound.
Stereo Pair
Connect two ULT Field 3 speakers wirelessly to create a stereo sound experience:
- Connect one ULT Field 3 speaker to your device via Bluetooth. This will be the primary speaker.
- On the primary speaker, press and hold the CONNECT button until the indicator flashes.
- On the second ULT Field 3 speaker, press the CONNECT button.
- The speakers will pair, with one acting as the left channel and the other as the right, providing a wider soundstage.
Sony Sound Connect App
Download the Sony Sound Connect app for additional control and customization:
- Adjust sound settings using the 7-band equalizer.
- Monitor the speaker's battery level.
- Access shortcut settings and recent listening history.
Hands-free Calling
The built-in microphone with Echo Cancelling technology allows for clear hands-free calls through the speaker when connected to a smartphone.
Portability and Durability
The ULT Field 3 is designed for portability and durability:
- The included stowable shoulder strap offers multiple carrying options.
- With an IP67 rating, the speaker is waterproof and dustproof, suitable for outdoor environments and resistant to salt water.
- Its shockproof design withstands everyday impacts.

Image: A display of three Sony ULT Field 3 speakers in various colors, highlighting the speaker's design and the included shoulder strap for easy transport.
Speaker Orientation
The ULT Field 3 can be used either standing upright or lying flat. Its design ensures optimal sound performance in both orientations.
Maintenance
Cleaning
To clean the speaker, wipe it with a soft, dry cloth. For stubborn dirt, use a cloth lightly dampened with water. Do not use abrasive cleaners, alcohol, or solvents, as these may damage the surface.
Battery Care
To prolong battery life, avoid fully discharging the battery frequently. If the speaker will not be used for an extended period, charge it to approximately 50% before storing.
Storage
Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures. Ensure the protective flap for the charging port is securely closed to maintain its waterproof and dustproof rating.
Troubleshooting
If you encounter issues with your ULT Field 3 speaker, refer to the following common solutions:
- No Power: Ensure the speaker is charged. Connect it to a power source using the USB Type-C cable.
- No Sound: Check the volume levels on both the speaker and your connected device. Ensure the speaker is properly paired via Bluetooth.
- Bluetooth Connection Issues: Turn off and on the Bluetooth function on your device and the speaker. Try unpairing and re-pairing the speaker. Ensure the speaker is within the effective Bluetooth range (approximately 10 meters or 33 feet).
- Poor Sound Quality: Ensure there are no obstructions between the speaker and the connected device. Try moving the speaker closer to the device. Adjust the equalizer settings via the Sony Sound Connect app.
- Speaker Not Charging: Verify the USB Type-C cable is securely connected to both the speaker and the power source. Try a different USB port or power adapter.
If the issue persists, please refer to the official Sony support website for further assistance.
Specifications
| Brand | Sony |
| Model Number | E2SNSRSULT30W |
| Connectivity Technology | Bluetooth |
| Audio Output Mode | Stereo |
| Battery Average Life | 24 Hours |
| Water Resistance Level | IP67 (Waterproof, Dustproof, Shockproof) |
| Item Dimensions (D x W x H) | 3.11"D x 10.08"W x 4.45"H |
| Item Weight | 2.69 Pounds |
| Control Method | Touch |
| Power Source | Battery Powered |
| Additional Features | ULT Power Sound, 2-way active design, Echo Cancelling, USB Type-C charging/powerbank, Party Connect, Stereo Pair, Sony Sound Connect App compatibility |
Warranty
The Sony ULT Field 3 Wireless Portable Bluetooth Speaker comes with a 1-year limited warranty. For detailed terms and conditions, please refer to the warranty documentation included with your product or visit the official Sony support website.
Support
For further assistance, product updates, or to download the full user manual, please visit the official Sony support website. You can also find FAQs and contact information for customer service there.