1. Introduction
Thank you for purchasing the Coby Bluetooth Wireless On-Ear Headphones. This manual provides instructions for setup, operation, and maintenance to ensure optimal performance and longevity of your device. These headphones offer versatile audio options including Bluetooth wireless connectivity, FM radio, and Micro TF card support, all within a comfortable and portable design.
2. Key Features
- Bluetooth Wireless Connectivity: Enjoy audio freedom with up to 33 feet (10 meters) wireless range.
- Long Battery Life: Up to 10 hours of playback time on a single charge.
- Multiple Listening Modes: Supports Bluetooth, Micro TF card for MP3 playback, and built-in FM radio.
- Integrated Controls: Earcup buttons for music playback (play, pause, fast forward) and call management (answer, reject).
- Built-in Microphone: Enables clear hands-free calling.
- Comfortable Design: Cushioned on-ear earcups and a padded, adjustable leatherette headband.
- Portable: Foldable earcups for easy storage and transport.
3. Package Contents
Ensure all items are present in the package:
- Coby Bluetooth Wireless On-Ear Headphones
- Charging Cable (Micro USB)
- 3.5mm Audio Cable
- User Manual (This document)
4. Product Overview
Familiarize yourself with the headphone components and controls.

Figure 1: Headphone Controls and Ports
- 1. TF Card Slot: Insert a Micro TF card for MP3 playback.
- 2. Micro USB Charging Port: Connect the charging cable here.
- 3. Foldable Headband: Allows for compact storage.
- 4. Volume Up / Track Forward Button: Press to increase volume, hold to skip to next track.
- 5. Volume Down / Track Back Button: Press to decrease volume, hold to skip to previous track.
- 6. Mode / EQ Button: Press to switch between Bluetooth, TF card, FM radio, and AUX modes. Hold for EQ settings (if available).
- 7. Call Button (Decline / Answer): Press to answer/end calls, hold to decline calls. Also acts as Play/Pause in music mode.
- 8. AUX-In Port: Connect the 3.5mm audio cable for wired listening.

Figure 2: Coby On-Ear Headphones (Front View)
This image shows the overall design of the Coby Bluetooth Wireless On-Ear Headphones in blue, highlighting the cushioned earcups and adjustable headband.

Figure 3: Foldable Design for Portability
The headphones feature a foldable design, allowing the earcups to collapse into the headband for compact storage and easy transport.
5. Setup
5.1 Charging the Headphones
- Connect the Micro USB end of the charging cable to the Micro USB Charging Port on the headphones.
- Connect the USB-A end of the charging cable to a USB power adapter (not included) or a computer's USB port.
- The LED indicator will illuminate during charging and turn off once fully charged.
- A full charge takes approximately 2 hours and provides up to 10 hours of playback time.
5.2 Bluetooth Pairing
- Ensure the headphones are charged.
- Press and hold the Power button (often integrated with the Call button) until the LED indicator flashes blue and red, indicating pairing mode.
- On your Bluetooth-enabled device (smartphone, tablet, computer), go to the Bluetooth settings.
- Search for available devices and select "Coby Headphones" (or similar name).
- Once paired, the LED indicator will flash blue slowly, and you will hear an audible confirmation.
5.3 Connecting via 3.5mm Audio Cable
For non-Bluetooth devices or to conserve battery, use the included 3.5mm audio cable.
- Connect one end of the 3.5mm audio cable to the AUX-In Port on the headphones.
- Connect the other end to the audio output jack of your device.
- The headphones will automatically switch to AUX mode.
5.4 Using Micro TF Card
Play MP3 files directly from a Micro TF card.
- Insert a Micro TF card (pre-loaded with MP3s) into the TF Card Slot until it clicks into place.
- Press the Mode button to switch to TF card mode.
- Use the music control buttons to play, pause, and skip tracks.
5.5 FM Radio
Listen to your favorite FM radio stations.
- Press the Mode button to switch to FM radio mode.
- Press and hold the Play/Pause button (often the Call button) to auto-scan and save available FM stations.
- Use the Track Forward/Back buttons to navigate between saved stations.
6. Operating Instructions
6.1 Power On/Off
- Power On: Press and hold the Power button (often the Call button) for approximately 3 seconds until the LED indicator lights up.
- Power Off: Press and hold the Power button for approximately 3 seconds until the LED indicator turns off.
6.2 Music Playback
- Play/Pause: Press the Call button once.
- Next Track: Press and hold the Volume Up / Track Forward button.
- Previous Track: Press and hold the Volume Down / Track Back button.
6.3 Call Management
- Answer Call: Press the Call button once.
- End Call: Press the Call button once during a call.
- Reject Call: Press and hold the Call button for approximately 2 seconds.
6.4 Volume Control
- Increase Volume: Press the Volume Up / Track Forward button.
- Decrease Volume: Press the Volume Down / Track Back button.
6.5 Mode Switching
Press the Mode button to cycle through available modes: Bluetooth, TF Card, FM Radio, and AUX.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the headphones. Do not use abrasive cleaners or solvents.
- Storage: When not in use, store the headphones in a cool, dry place, away from direct sunlight and extreme temperatures. Utilize the foldable design for compact storage.
- Battery Care: To prolong battery life, fully charge the headphones before first use and at least once every three months if not used regularly.
- Avoid Water: These headphones are not waterproof. Avoid exposure to water or excessive moisture.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones do not power on. | Low battery. | Charge the headphones for at least 2 hours. |
| Cannot pair via Bluetooth. | Headphones not in pairing mode; device Bluetooth off; too far from device. | Ensure headphones are in pairing mode (flashing blue/red LED). Turn on Bluetooth on your device. Move headphones closer to the device (within 33 feet/10 meters). |
| No sound. | Volume too low; incorrect mode; device not playing audio. | Increase headphone and device volume. Ensure correct mode (Bluetooth, TF, FM, AUX). Check if audio is playing on the connected device. |
| FM radio not working. | Poor signal; stations not scanned. | Move to an area with better signal. Perform an auto-scan for stations (hold Play/Pause button in FM mode). |
| Microphone not working during calls. | Bluetooth connection issue; device settings. | Ensure headphones are properly connected via Bluetooth. Check microphone settings on your connected device. |
9. Specifications
| Model Number | CHBT790BLU |
| Connectivity Technology | Wireless (Bluetooth), Wired (3.5mm AUX) |
| Wireless Range | Up to 33 feet (10 meters) |
| Battery Type | Lithium-ion |
| Battery Life | Up to 10 hours playback |
| Charging Time | Approximately 2 hours |
| Special Features | Built-in Microphone, FM Radio, Micro TF Card Slot, Folding Design |
| Dimensions (L x W x H) | 7.4 x 3.7 x 8.2 inches |
| Item Weight | 8 ounces |
10. Warranty and Support
For warranty information and technical support, please refer to the warranty card included with your product or visit the official Coby website. Keep your purchase receipt as proof of purchase.
Manufacturer: Summit Electronics LLC
11. Product Video
Video: Coby Bluetooth Wireless On-Ear Headphones Overview
This video provides a visual overview of the Coby Bluetooth Wireless On-Ear Headphones, showcasing their features, design, and functionality. It highlights the wireless capabilities, FM radio, and comfortable fit.





