Introduction
This manual provides comprehensive instructions for the safe and efficient use of your Coby True Wireless Earbuds (Model CETW535). Please read this manual thoroughly before using the product and retain it for future reference.
The Coby True Wireless Earbuds offer a seamless audio experience with Bluetooth 5.3 technology, a smart battery display, and intuitive controls for music and calls. They are designed for comfort and convenience, featuring a built-in microphone for hands-free communication.
Package Contents
- Coby True Wireless Earbuds (Left and Right)
- Charging Case with Smart Battery Display
- USB Charging Cable
- User Manual (this document)
Setup
1. Initial Charging
Before first use, fully charge the earbuds and the charging case. Connect the charging case to a USB power source using the provided USB cable. The digital display on the case will indicate the charging status and battery level.

Image: The Coby True Wireless Earbuds are shown inside their open charging case, which displays "100%" on its digital screen, indicating a full charge. The earbuds are black and fit snugly into their respective slots.

Image: A close-up view of the Coby True Wireless Earbuds resting in their open charging case. The case features a digital display showing "95%", indicating the current battery level of the case. The black earbuds are visible, with their microphones facing upwards.
2. Pairing with a Bluetooth Device
- Ensure the earbuds are charged and inside the charging case.
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for "CETW535" or "Coby Earbuds" in the list of available Bluetooth devices.
- Select the device name to connect. Once connected, you will hear a confirmation tone.
- The earbuds will automatically re-pair with the last connected device when removed from the case, if Bluetooth is enabled on the device.
3. Fitting the Earbuds
Gently insert each earbud into the corresponding ear (L for left, R for right). Adjust them slightly until they feel secure and comfortable. A proper fit ensures optimal sound quality and comfort.

Image: A woman is shown smiling while wearing a black Coby True Wireless Earbud in her right ear, demonstrating a comfortable and secure fit.
Operating Instructions
Power On/Off
- Power On: Open the charging case, or press and hold the touch control area on each earbud for 3 seconds.
- Power Off: Place the earbuds back into the charging case and close the lid, or press and hold the touch control area on each earbud for 5 seconds.
Music Controls
The earbuds feature touch-sensitive controls for easy management of your audio playback.
- Play/Pause: Tap either earbud once.
- Next Track: Double-tap the right earbud.
- Previous Track: Double-tap the left earbud.
- Volume Up: Triple-tap the right earbud.
- Volume Down: Triple-tap the left earbud.

Image: A man is shown wearing a Coby True Wireless Earbud in his right ear, taking a drink from a water bottle, illustrating the earbuds' use during active moments.
Call Controls
Manage your calls effortlessly with the built-in microphone and touch controls.
- Answer/End Call: Tap either earbud once.
- Reject Call: Press and hold either earbud for 2 seconds.

Image: A man is depicted wearing a Coby True Wireless Earbud in his left ear while concentrating on a laptop screen, highlighting the earbuds' suitability for work or study environments.
Voice Assistant Activation
Activate your device's voice assistant (Siri or Google Assistant) for hands-free commands.
- Activate Voice Assistant: Press and hold either earbud for 3 seconds (after powering on, before powering off gesture).
Intelligent Digital Battery Display
The charging case features a digital display that shows the remaining battery percentage of the case and individual charging status of the earbuds.
- The large number indicates the charging case's battery percentage.
- Small icons next to the percentage indicate the charging status of the left and right earbuds.

Image: The Coby True Wireless Earbuds are shown in their open charging case, with the digital display indicating "95%" battery life for the case. The black earbuds are visible, ready for use or charging.
Maintenance
- Cleaning: Use a soft, dry, lint-free cloth to clean the earbuds and charging case. Do not use harsh chemicals or abrasive materials.
- Storage: When not in use, store the earbuds in their charging case to protect them and keep them charged. Store in a cool, dry place away from extreme temperatures.
- Charging: To prolong battery life, avoid fully discharging the battery frequently. Charge the case and earbuds regularly, even if not in constant use.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| Earbuds not pairing with device. |
|
| Only one earbud is playing sound. |
|
| Charging case not charging. |
|
| Poor sound quality or disconnections. |
|
Specifications
| Feature | Detail |
|---|---|
| Brand | Coby |
| Model Name | True Wireless Earbuds |
| Model Number | CETW535 |
| Connectivity Technology | Bluetooth 5.3 |
| Color | Black |
| Earbud Playtime | Up to 6.5 hours (on a full charge) |
| Total Playtime (with case) | Up to 22 hours |
| Microphone | Built-in |
| Voice Assistant Support | Siri, Google Assistant |
| Dimensions (L x W x H) | 0.99 x 1.85 x 2.44 inches (Charging Case) |
| Item Weight | 6.1 ounces |
| UPC | 643620020982 |
| Manufacturer | Summit Electronics, LLC |
Warranty and Support
Specific warranty information for the Coby True Wireless Earbuds (Model CETW535) is not provided within this manual. For details regarding warranty coverage, terms, and conditions, please refer to the warranty card included with your product packaging or visit the official Coby website.
For technical support or further assistance, please contact Coby customer service through the contact information provided on their official website or product packaging.





