Product Overview
The OontZ Ultra Dual Portable Bluetooth Speaker 5.0 offers a dynamic stereo sound experience with two wireless speakers. Each speaker delivers 14 watts of power, providing clear and detailed audio. Designed for versatility, these speakers are IPX7 waterproof, making them suitable for various environments, from indoor use to outdoor activities like beach or pool gatherings. They feature Bluetooth 5.0 for extended range and a long-lasting battery.

Image: Two OontZ Ultra Dual Portable Bluetooth Speakers in black, showcasing their compact design and control panel.
What's in the Box
- OontZ Ultra Dual Portable Bluetooth Speaker (2 units)
- USB-C cable (for charging)
- Audio Cable
- User Manual
Setup Guide
1. Charging the Speakers
Before initial use, fully charge both OontZ Ultra Dual speakers. Connect the provided USB-C cable to the charging port on each speaker and to a compatible USB power source. A full charge takes approximately 20 hours, providing up to 20 hours of playtime.

Image: Detail of the speaker's control panel and the covered charging port, indicating its waterproof design.
2. Bluetooth Pairing
To pair your OontZ Ultra Dual speakers with a Bluetooth-enabled device:
- Power on both speakers by pressing and holding the power button until the indicator light illuminates.
- On your device (smartphone, tablet, laptop), enable Bluetooth and search for available devices.
- Select "OontZ Ultra" from the list of devices. The speaker will indicate a successful connection.
- For stereo sound, pair the two speakers together via the OontZ app (Dual Mode is compatible with 4th Generation Angle 3 speakers).

Image: Demonstrating the 100ft Bluetooth 5.0 range of the OontZ Ultra speaker in an outdoor setting.

Image: Two OontZ Ultra speakers paired for stereo sound, ideal for social gatherings.
Operating Instructions
Controls
The OontZ Ultra speakers feature intuitive controls located on the top panel:
- Power Button: Press and hold to turn the speaker on/off.
- Bluetooth Button: Press to enter pairing mode.
- Volume Up (+): Increase volume.
- Volume Down (-): Decrease volume.
- Play/Pause: Control music playback.
- Next Track (>): Skip to the next song.
- Previous Track (<): Go to the previous song.
Waterproof Feature (IPX7)
The OontZ Ultra speakers are IPX7 waterproof, meaning they can be submerged in water up to 3 feet (1 meter) for 30 minutes. This makes them ideal for use in the shower, by the pool, or at the beach. Ensure the charging port cover is securely closed before exposing the speaker to water.

Image: The speaker's IPX7 waterproof rating is highlighted by its partial submersion in water.
Maintenance
To ensure the longevity and optimal performance of your OontZ Ultra Dual speakers, follow these maintenance guidelines:
- Cleaning: Use a soft, damp cloth to clean the speaker's exterior. Avoid using harsh chemicals or abrasive cleaners.
- Storage: Store the speakers in a cool, dry place away from direct sunlight and extreme temperatures.
- Charging Port: Always ensure the rubber cover for the charging port is securely closed when not charging to maintain its waterproof integrity.
- Battery Care: For best battery life, avoid fully discharging the speakers frequently. Charge them regularly, even if not in constant use.
Troubleshooting
If you encounter issues with your OontZ Ultra Dual speakers, try the following solutions:
| Problem | Solution |
|---|---|
| Speaker does not power on. | Ensure the speaker is fully charged. Connect it to a power source using the USB-C cable and allow it to charge for a few hours. |
| Cannot pair via Bluetooth. | Make sure the speaker is in pairing mode (indicator light blinking). Turn off and on your device's Bluetooth. Ensure no other devices are connected to the speaker. Move closer to the speaker. |
| No sound or low volume. | Check the volume levels on both the speaker and your connected device. Ensure the speaker is properly paired. Try playing different audio sources. |
| Sound distortion. | Reduce the volume on both the speaker and your connected device. Ensure the audio source is not distorted. |
Specifications
- Model Name: OontZ Ultra Dual Black
- Brand: Cambridge Soundworks
- Dimensions: 6.5”D x 2.8”W x 2.8”H
- Item Weight: 1.06 pounds (0.48 Kilograms)
- Speaker Maximum Output Power: 14 Watts
- Battery Life: 20 Hours
- Charging Time: 20 Hours
- Wireless Communication Technology: Bluetooth 5.0
- Maximum Range: 100 Feet
- Water Resistance Level: IPX7 (Waterproof)
- Audio Output Mode: Stereo
- Included Components: User Manual, USB-C cable, Audio Cable
Warranty and Support
The OontZ Ultra Dual Portable Bluetooth Speaker comes with a Limited Warranty. For detailed warranty information and support, please refer to the included User Manual or visit the official Cambridge Soundworks website.
For further assistance, you may also contact Cambridge Soundworks customer support directly.





