1. Introduction
Thank you for choosing the Coby Wireless 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 using the product.
2. Safety Information
- Do not expose the speaker to water, moisture, or extreme temperatures.
- Avoid dropping or subjecting the speaker to strong impacts.
- Do not attempt to disassemble, repair, or modify the speaker yourself. Refer all servicing to qualified personnel.
- Keep the speaker away from heat sources, direct sunlight, and flammable materials.
- Use only the provided charging cable and adapter.
3. Package Contents
Please check the box for the following items:
- Coby Wireless Bluetooth Speaker
- USB Charging Cable
- Auxiliary Audio Cable
- User Manual
4. Product Overview
The Coby Wireless Bluetooth Speaker is designed for versatile audio playback, featuring Bluetooth 5.3 connectivity, multiple LED light modes, FM radio, and TF card input. Its portable design with a built-in handle makes it suitable for various indoor and outdoor settings.

Figure 4.1: Front view of the Coby Wireless Bluetooth Speaker, showcasing its vibrant LED light ring.

Figure 4.2: Key features of the speaker, including True Wireless Technology, a built-in handle for portability, a rechargeable battery, dynamic party lights, and a karaoke mode.
5. Controls and Functions
Familiarize yourself with the control panel located on the top of the speaker:

Figure 5.1: Top control panel of the speaker with labeled buttons.
- Light Mode Button: Press to cycle through different LED light modes.
- Mode Button: Press to switch between Bluetooth, FM Radio, AUX, and TF Card modes.
- Rewind/Volume Down Button: Press briefly to go to the previous track; press and hold to decrease volume.
- Play/Pause Button: Press to play or pause audio. In FM mode, press and hold to auto-scan stations.
- Fast Forward/Volume Up Button: Press briefly to go to the next track; press and hold to increase volume.
- True Wireless Button: Press to initiate True Wireless Stereo (TWS) pairing with another compatible speaker.
6. Setup
6.1 Initial Charging
Before first use, fully charge the speaker. Connect the USB charging cable to the speaker's charging port and the other end to a USB power adapter (not included) or a computer USB port. The charging indicator light will illuminate during charging and turn off when fully charged.
7. Operating Instructions
7.1 Power On/Off
Press and hold the Power button (usually integrated with the Mode button or a separate button) for a few seconds to turn the speaker ON or OFF.
7.2 Bluetooth Pairing
The speaker utilizes Bluetooth version 5.3 for fast and stable connections.
- Turn on the speaker. It will automatically enter Bluetooth pairing mode, indicated by a flashing LED light and an audible prompt.
- Enable Bluetooth on your smartphone, tablet, or other Bluetooth-enabled device.
- Search for "COBY-CPA540" (or similar name) in your device's Bluetooth list.
- Select the speaker to connect. Once paired, the LED light will stop flashing, and you will hear a confirmation sound.
7.3 True Wireless Stereo (TWS) Pairing
For an enhanced stereo experience, you can pair two COBY-CPA540 speakers together using TWS technology.
Video 7.1: Demonstration of the Coby True Wireless Bluetooth Speaker's features, including color-changing lights and TWS pairing capabilities.
- Ensure both speakers are turned on and not connected to any other Bluetooth device.
- On one speaker (this will be the primary speaker), press the True Wireless Button (button 6). It will emit a pairing sound.
- The two speakers will automatically connect to each other. Once connected, you will hear a confirmation sound.
- Now, connect your Bluetooth device to the primary speaker as described in section 7.2. Audio will play through both speakers in stereo.

Figure 7.3: Visual guide for connecting two speakers via True Wireless Technology for a stereo sound experience.
7.4 FM Radio Mode
To listen to FM radio:
- Press the Mode Button (button 2) repeatedly until you hear the FM radio prompt.
- Press and hold the Play/Pause Button (button 4) to auto-scan and save available FM stations.
- Use the Rewind/Volume Down Button (button 3) and Fast Forward/Volume Up Button (button 5) to navigate between saved stations.
7.5 Auxiliary Input (AUX)
Connect external audio devices using the 3.5mm auxiliary cable:
- Connect one end of the 3.5mm AUX cable to the speaker's AUX-in port.
- Connect the other end to the headphone jack or audio output of your external device.
- Press the Mode Button (button 2) until the speaker enters AUX mode.
- Control playback and volume from your connected device or the speaker's controls.
7.6 TF Card Playback
To play music directly from a TF (MicroSD) card:
- Insert a TF card (with MP3 audio files) into the TF card slot on the speaker.
- The speaker will automatically switch to TF card mode and begin playing music. If not, press the Mode Button (button 2) to select TF card mode.
- Use the Rewind/Volume Down Button (button 3) and Fast Forward/Volume Up Button (button 5) to control tracks.
7.7 LED Light Modes
The speaker features multiple dynamic LED light modes to enhance your listening experience.

Figure 7.7: Examples of the three beautiful light modes available on the speaker.
Press the Light Mode Button (button 1) repeatedly to cycle through the available light modes. Each press will change the pattern or color scheme of the LED lights.
7.8 Karaoke Mode
The speaker supports karaoke functionality, allowing you to connect a microphone (not included) and sing along to your favorite tunes.

Figure 7.8: The speaker is ready for karaoke when a microphone is connected.
Connect a compatible microphone to the designated microphone input port on the speaker. Adjust the microphone volume using the speaker's controls or the microphone's built-in controls, if available.
8. Charging
The Coby Wireless Bluetooth Speaker is equipped with a rechargeable Lithium Ion battery, providing up to 7 hours of playtime on a single charge. When the battery is low, the speaker will indicate this with an audible alert or a flashing indicator light.
To charge, connect the USB charging cable to the speaker's charging port and a standard USB power source. A full charge typically takes a few hours. Avoid overcharging the battery to prolong its lifespan.
9. Maintenance
To keep your speaker in optimal condition:
- Wipe the speaker with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Keep the ports free of dust and debris.
- Store the speaker in a cool, dry place when not in use for extended periods.
10. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not turn on. | Battery is depleted. | Charge the speaker fully. |
| No sound. | Volume is too low or muted. | Increase volume on the speaker and your connected device. |
| Bluetooth pairing fails. | Speaker is already connected to another device; device Bluetooth is off; speaker is out of range. | Ensure speaker is in pairing mode; turn off Bluetooth on other devices; restart speaker and device; move closer to speaker. |
| FM radio reception is poor. | Weak signal. | Adjust speaker position; extend antenna if available. |
11. Specifications
| Feature | Detail |
|---|---|
| Model Name | BT Speaker (COBY-CPA540) |
| Speaker Type | Bluetooth, Party, Karaoke |
| Connectivity Technology | Bluetooth, Auxiliary, USB |
| Wireless Communication Technology | Bluetooth 5.3 |
| Bluetooth Range | 35 Feet |
| Power Source | Battery Powered (1 Lithium Ion battery included) |
| Playtime | Up to 7 hours |
| Special Features | FM Radio, 11 LED Light Modes, Aux Input, TF Card Input, Karaoke Mode, True Wireless Stereo (TWS) |
| Product Dimensions | 7.75"D x 11"W x 8.25"H |
| Item Weight | 2.75 pounds |
| Color | Black |
| Indoor/Outdoor Usage | Indoor |
12. Warranty Information
This Coby Wireless Bluetooth Speaker comes with a Limited Warranty. Please refer to the warranty card included in your package for specific terms and conditions, including coverage duration and claim procedures. Keep your purchase receipt as proof of purchase for warranty claims.
13. Customer Support
For further assistance, technical support, or warranty inquiries, please contact Coby customer service. Refer to the contact information provided on the product packaging or the official Coby website.
Note: Product specifications and features are subject to change without prior notice.







