Introduction
Thank you for choosing the DOSS SoundBox Pro+ P300 Bluetooth Speaker. This manual provides essential information for setting up, operating, and maintaining your speaker to ensure optimal performance and longevity. Please read this manual thoroughly before use and retain it for future reference.

The DOSS SoundBox Pro+ P300 Bluetooth Speaker, featuring its sleek design and vibrant LED lighting.
What's in the Box
- DOSS SoundBox Pro+ P300 Bluetooth Speaker
- User Manual
- Charging Cable
Setup
Initial Charging
Before first use, fully charge the speaker. Connect the provided charging cable to the speaker's charging port and a compatible USB power adapter (not included). The charging indicator light will show charging status. A full charge takes approximately 3.5 hours.
Power On/Off
- To power on: Press and hold the Power button until the indicator light illuminates.
- To power off: Press and hold the Power button until the indicator light turns off.
Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth pairing mode (indicated by a flashing blue light).
- On your device (smartphone, tablet, laptop), enable Bluetooth and search for available devices.
- Select "DOSS SoundBox Pro+ P300" from the list.
- Once connected, the speaker will emit an audible confirmation, and the blue indicator light will become solid.
True Wireless Stereo (TWS) Pairing
For an enhanced stereo experience, you can pair two DOSS SoundBox Pro+ P300 speakers together.
- Ensure both speakers are powered on and disconnected from any Bluetooth devices.
- On one speaker, press and hold the ADD button for 2 seconds. It will enter TWS pairing mode.
- Repeat the previous step on the second speaker.
- The speakers will automatically connect to each other. Once connected, one speaker will act as the master (left channel) and the other as the slave (right channel).
- Connect your device to the master speaker via Bluetooth as described in the "Bluetooth Pairing" section.

Two DOSS SoundBox Pro+ P300 speakers connected for a True Wireless Stereo experience.
Operating Instructions
Controls Overview
| Button | Function |
|---|---|
| Power Button | Press and hold to Power On/Off. |
| MODE Button | Switch between Bluetooth and AUX modes. |
| - Button | Short press for previous track; Long press to decrease volume. |
| Play/Pause Button | Play/Pause music; Answer/End calls. |
| + Button | Short press for next track; Long press to increase volume. |
| ADD Button | Press and hold for TWS pairing. |
| EXTRA BASS Button | Press to activate/deactivate Extra Bass mode. Press and hold for 2 seconds to turn off the light. |
Enhanced Bass
Press the EXTRA BASS button to activate a deeper, more resonant bass output. Press it again to return to standard sound mode. This feature enhances the overall quality of music playback, creating a more immersive listening experience.

The Extra Bass button and the 7-inch large passive radiator for enhanced bass.
Dynamic Light Show
The speaker features six colorful light modes that synchronize with the rhythm of your music. These pulsating lights create a dynamic atmosphere. To turn off the light, press and hold the EXTRA BASS button for 2 seconds.

The speaker displaying its beat-synced light show, enhancing the listening experience.
Maintenance
Cleaning
Wipe the speaker with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure the charging port cover is securely closed before cleaning or exposure to water.
Waterproofing (IPX6)
The DOSS SoundBox Pro+ P300 is IPX6 waterproof, meaning it can withstand powerful water jets. It is suitable for use at the beach or poolside. However, it is not designed for submersion in water. Always ensure the charging port cover is sealed tightly to maintain water resistance.

The speaker's IPX6 rating allows for worry-free use near water, such as at a pool or beach.
Battery Care
To prolong battery life, avoid fully discharging the speaker frequently. Charge the speaker regularly, even if not in use for extended periods. Store in a cool, dry place.

The DOSS SoundBox Pro+ P300 offers up to 20 hours of playtime on a single charge.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Low battery. | Charge the speaker fully. |
| Cannot pair via Bluetooth. | Speaker not in pairing mode; Device Bluetooth off; Too far from device. | Ensure speaker is in pairing mode (flashing blue light). Turn on Bluetooth on your device. Move speaker closer to device (within 25 meters). |
| No sound. | Volume too low; Paused music; Incorrect input mode. | Increase volume on speaker and device. Check if music is playing. Ensure correct input mode (Bluetooth/AUX). |
| TWS pairing fails. | Speakers already connected to other devices; Not in TWS pairing mode. | Disconnect both speakers from any Bluetooth devices. Ensure both are in TWS pairing mode (press and hold ADD button). |
Specifications
| Feature | Detail |
|---|---|
| Model Name | SoundBox Pro+ P300 |
| Speaker Type | Outdoor |
| Connectivity Technology | Bluetooth |
| Audio Output Mode | Stereo |
| Speaker Maximum Output Power | 24 Watts (Note: Product description states 40W, specification states 24W. Using the specification value for technical accuracy.) |
| Battery Life | 20 Hours |
| Charging Time | 3.5 Hours |
| Water Resistance Level | IPX6 Waterproof |
| Bluetooth Range | 25 Meters |
| Product Dimensions | 10.3"D x 3.3"W x 3.6"H |
| Item Weight | 2.42 pounds (1.1 Kilograms) |
| Material | Acrylonitrile Butadiene Styrene (ABS), Iron, Polycarbonate (PC) |
Warranty and Support
Warranty Information
The DOSS SoundBox Pro+ P300 comes with a 1-year warranty from the date of purchase, covering any quality-related concerns. Please retain your proof of purchase for warranty claims.

A customer support representative ready to assist with product inquiries.
Customer Support
If you have any issues with the product or require assistance, please feel free to contact DOSS customer support. We are committed to providing you with 24-hour prompt assistance and support!
- Phone: 1-833-275-3677
- Email: support@dossav.com





