1. Introduction
The Max Power MPD404L is a versatile 4-inch portable Bluetooth speaker designed for on-the-go audio. It features built-in USB and SD card slots for direct media playback, an integrated FM radio, and an MP3/WMA player. Its compact design includes a convenient phone/tablet holder, making it ideal for various entertainment needs. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance of your speaker.
2. Package Contents
Please check the box for the following items:
- Max Power MPD404L Portable Bluetooth Speaker
- USB cable
- SD card (if included as part of the package)
- User Manual (this document)
3. Product Overview

Figure 3.1: Max Power MPD404L Portable Bluetooth Speaker. This image displays the Max Power MPD404L portable Bluetooth speaker. It is black with a prominent handle on top. The front features a metal mesh grille covering the speaker, which emits a blue LED light. Above the grille, there is a control panel with buttons labeled 'MODE', 'K</V-', 'II/SCAN', and 'I/V+'. The model number 'MPD404L' is also visible on the panel. The speaker has a slot for a phone or tablet on its top surface.
Key Features:
- 4-inch Portable Speaker
- Built-in USB & SD Slot
- Built-in Bluetooth Connectivity
- Phone / Tablet holder
- FM Radio
- MP3/WMA Player
- Available in Black, Blue & Red Color (color of unit may vary)
4. Setup Guide
4.1 Charging the Speaker
- Connect the provided USB cable to the speaker's charging port.
- Plug the other end of the USB cable into a compatible USB power adapter (not included) or a computer's USB port.
- Ensure the power adapter is connected to an AC outlet (110V-240V).
- Allow the speaker to charge fully before first use. A charging indicator light (if present) will typically change color or turn off when charging is complete.
4.2 Powering On/Off
- To power on, locate the power switch (usually on the back or top panel) and slide it to the 'ON' position.
- To power off, slide the switch to the 'OFF' position.
5. Operating Instructions
5.1 Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth mode. If not, press the MODE button until you hear a prompt indicating Bluetooth mode.
- On your smartphone, tablet, or other Bluetooth-enabled device, go to the Bluetooth settings.
- Search for available devices. You should see "MPD404L" or "Max Power" in the list.
- Select "MPD404L" to pair. Once paired, the speaker will usually emit a confirmation sound.
- You can now play audio from your device through the speaker.
5.2 USB/SD Card Playback
- Insert a USB flash drive or SD card (with MP3/WMA audio files) into the respective slot on the speaker.
- The speaker should automatically switch to USB or SD card mode and begin playing audio. If not, press the MODE button to cycle through modes until you reach USB or SD.
- Use the K</V- and I/V+ buttons to navigate tracks and adjust volume.
5.3 FM Radio Operation
- Press the MODE button to switch to FM Radio mode.
- Press the II/SCAN button to automatically scan and save available FM stations.
- Once scanning is complete, use the K</V- and I/V+ buttons to switch between saved stations.
5.4 Using the Phone/Tablet Holder
The speaker features a built-in slot on its top surface designed to securely hold most smartphones and small tablets, providing a convenient viewing angle while enjoying audio.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker's exterior. Do not use abrasive cleaners or solvents.
- Storage: Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the speaker regularly, even if not in use for extended periods.
- Water Exposure: This speaker is NOT waterproof. Avoid exposure to water or high humidity.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Battery is depleted. | Connect the speaker to a power source using the USB cable and allow it to charge. |
| No sound from the speaker. | Volume is too low; Incorrect mode selected; Device not paired. | Increase speaker and device volume. Press MODE to select the correct input. Re-pair your Bluetooth device. |
| Bluetooth pairing fails. | Speaker not in pairing mode; Device too far; Interference. | Ensure speaker is in Bluetooth mode. Move device closer to speaker. Turn off other Bluetooth devices nearby. |
| USB/SD card not playing. | Incorrect file format; Card/drive not inserted correctly; Corrupted files. | Ensure files are MP3/WMA format. Re-insert the USB drive/SD card. Try a different USB drive/SD card. |
| FM radio reception is poor. | Weak signal; Environmental interference. | Relocate the speaker to an area with better reception. Extend any built-in antenna if available. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | MPD404L |
| Brand | Max Power |
| Speaker Type | Multimedia |
| Special Feature | Portable |
| Compatible Devices | Tablet, Smartphone |
| Controller Type | Button |
| Surround Sound Channel Configuration | 2.1 |
| Color | Silver (Note: Available in Black, Blue & Red Color) |
| Included Components | USB cable, SD card |
| Impedance | 4 Ohm |
| Is Waterproof | FALSE |
| Control Method | App (Note: Primary control via buttons) |
| Wireless Communication Technology | Bluetooth |
| Speaker Size | 4 Inches |
| Power Source | Corded Electric (AC: 110V-240V) |
| Woofer Diameter | 4 Inches |
| Audio Driver Type | Dynamic Driver |
| Bluetooth Range | 10 Meters |
| Connectivity Protocol | Bluetooth |
| Includes MP3 player? | Yes |
| UPC | 305399542446 |
| Manufacturer | Max Power |
| Package Dimensions | 9.37 x 6.57 x 3.9 inches |
| Item Weight | 1.28 pounds |
| Connectivity Technology | Bluetooth, USB |
| Audio Output Mode | Stereo |
| Mounting Type | Tabletop Mount |
9. Warranty and Support
9.1 Warranty Information
The Max Power MPD404L Portable Bluetooth Speaker comes with a Limited Warranty. Please refer to the warranty card included in your package for specific terms, conditions, and duration of coverage. Keep your purchase receipt as proof of purchase for warranty claims.
9.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Max Power customer support. Contact information can typically be found on the product packaging or the official Max Power website.
Please have your model number (MPD404L) and purchase details ready when contacting support.





