Introduction
Thank you for purchasing the Coby Powergrip II 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.

Image: The Coby Powergrip II Bluetooth Speaker, black, with a handle on top and control buttons visible.
Package Contents
Ensure all items are present in the package:
- Coby Powergrip II Bluetooth Speaker
- Micro USB Charger Cable
- AUX Cord
- User Manual (this document)
Product Overview
Familiarize yourself with the speaker's components and controls.

Image: A close-up view of the speaker's top control panel, showing buttons for power, play/pause, volume up/next track, and volume down/previous track.
Control Panel
- Power Button: Press and hold to turn on/off. Short press to play/pause.
- Mode Button: Short press to switch between Bluetooth, FM Radio, AUX, and TF Card modes.
- Volume Down / Previous Track: Short press for previous track, long press to decrease volume.
- Volume Up / Next Track: Short press for next track, long press to increase volume.

Image: The rear view of the speaker showing the Micro USB charging port, AUX input, USB-A port, and TF card slot, all clearly labeled.
Ports and Inputs
- Micro USB Port: For charging the speaker.
- AUX Port: For connecting external audio devices via the included AUX cable.
- USB Port: For playing audio from a USB flash drive.
- TF Card Slot: For playing audio from a TF (MicroSD) card.
Setup and First Use
Charging the Speaker
Before first use, fully charge the speaker. Connect the supplied Micro USB cable to the speaker's Micro USB port and the other end to a USB power adapter (not included) or a computer's USB port. The charging indicator light will illuminate during charging and turn off when fully charged.
A full charge provides up to 6 hours of playtime.
Powering On/Off
Press and hold the Power Button for approximately 3 seconds to turn the speaker on or off. A voice prompt will indicate the power status.
Operating Instructions
Bluetooth Mode
- Turn on the speaker. It will automatically enter Bluetooth pairing mode, indicated by a flashing blue LED light and a voice prompt.
- Enable Bluetooth on your smartphone or other Bluetooth-enabled device.
- Search for "Coby Powergrip II" in your device's Bluetooth list and select it to pair.
- Once successfully paired, the LED light will turn solid blue, and you will hear a confirmation sound.
- You can now play audio from your device through the speaker.
True Wireless Stereo (TWS) Pairing: To pair two Coby Powergrip II speakers for stereo sound:
- Ensure both speakers are turned on and not connected to any Bluetooth device.
- On one speaker, double-press the Mode Button. The speaker will enter TWS pairing mode.
- The two speakers will automatically connect to each other. A confirmation sound will indicate successful TWS pairing.
- Once TWS paired, connect your device to one of the speakers via Bluetooth as described above. Both speakers will now play audio in stereo.

Image: An illustration showing the speaker with icons for True Wireless Connectivity, Rechargeable Battery, and Playtime, emphasizing its wireless capabilities.
Hands-Free Calling
When connected via Bluetooth, the speaker can be used for hands-free calls thanks to its built-in microphone.
- Answer Call: Short press the Power Button.
- End Call: Short press the Power Button again.
- Reject Call: Long press the Power Button.
FM Radio Mode
- Turn on the speaker and short press the Mode Button until you hear the FM Radio voice prompt.
- Long press the Power Button to automatically scan and save available FM stations.
- Use the Volume Up/Next Track and Volume Down/Previous Track buttons to navigate between saved stations.
AUX Mode
Connect an external audio device (e.g., MP3 player, computer) using the included 3.5mm AUX cable to the speaker's AUX port. The speaker will automatically switch to AUX mode or you can select it using the Mode Button.
USB/TF Card Mode
Insert a USB flash drive or TF (MicroSD) card into the respective port. The speaker will automatically detect the storage device and begin playing audio files. Use the track control buttons to navigate songs.
Maintenance and Care
- Keep the speaker away from water, moisture, and extreme temperatures. The speaker is NOT waterproof.
- Clean the speaker with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Do not attempt to disassemble or repair the speaker yourself. This will void the warranty.
- Store the speaker in a cool, dry place when not in use for extended periods.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not turn on. | Low battery. | Charge the speaker fully. |
| Cannot pair via Bluetooth. | Speaker not in pairing mode; device Bluetooth off; speaker too far. | Ensure speaker is in pairing mode (flashing blue LED). Turn on device Bluetooth. Move speaker closer to device (within 33 feet). |
| No sound. | Volume too low; incorrect mode; device not playing. | Increase speaker and device volume. Ensure correct mode (Bluetooth, AUX, etc.). Check if audio is playing on the connected device. |
| Poor FM radio reception. | Weak signal. | Relocate the speaker to an area with better reception. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | POWERGRIP II |
| Model Number | CSTW455BLK |
| Speaker Type | Bluetooth |
| Connectivity Technology | Bluetooth, Auxiliary, USB |
| Wireless Communication Technology | Bluetooth |
| Special Feature | Built-in Microphone, FM Radio, True Wireless Stereo (TWS) |
| Power Source | Battery Powered |
| Battery Life | Up to 6 Hours |
| Maximum Range | 33 Feet (10 meters) |
| Product Dimensions (LxWxH) | 8.5" x 4.5" x 3.5" |
| Item Weight | 1.66 pounds |
| Color | Black |
| Is Waterproof | No |

Image: The Coby Powergrip II speaker shown with its length (8.5"), width (4.5"), and height (3.5") dimensions indicated.
Warranty Information
The Coby Powergrip II Bluetooth Speaker comes with a Limited Warranty provided by Summit Electronics LLC. For specific details regarding warranty coverage, duration, and terms, please refer to the warranty card included in your product packaging or contact Coby customer support.
Note: Any unauthorized attempts to repair or modify the device will void the warranty.
Customer Support
For technical assistance, troubleshooting, or warranty inquiries, please contact Coby customer support:
- Manufacturer: Summit Electronics LLC
- Brand Website: www.cobyusa.com
- Please refer to your product packaging or included documentation for the most up-to-date contact information.





