1. Introduction
Thank you for choosing the Celly Ultrasound ULTRASOUNDWH True Wireless Earphones. These earphones are designed to provide a high-quality audio experience with the convenience of wireless connectivity. This manual will guide you through the setup, operation, and maintenance of your new earphones.
2. Package Contents
- Celly Ultrasound True Wireless Earphones (Left and Right)
- Charging Case
- USB Charging Cable
- User Manual
3. Product Overview

Image: Celly Ultrasound True Wireless Earphones, white in color, resting inside their matching white charging case. The case is open, revealing the two earbuds. The earbuds have a stem design with silicone ear tips. The charging case has a Celly logo on the front.
The Celly Ultrasound ULTRASOUNDWH earphones feature a compact design for comfortable wear and a portable charging case for extended battery life. Each earphone is equipped with a microphone for hands-free calls.
4. Setup
4.1 Initial Charging
- Before first use, fully charge the charging case and earphones.
- Place both earphones into the charging case.
- Connect the USB charging cable to the charging port on the case and to a power source (e.g., USB wall adapter, computer USB port).
- The indicator light on the charging case will show charging status. Once fully charged, the indicator light will change or turn off.
4.2 Pairing with a Device
- Ensure the earphones are charged and placed in the charging case.
- Open the charging case lid. The earphones will automatically enter pairing mode, and an indicator light on the earphones will flash.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for available Bluetooth devices and select "Celly Ultrasound" from the list.
- Once connected, the indicator light on the earphones will stop flashing, and you will hear a confirmation tone.
- The earphones will automatically reconnect to the last paired device when taken out of the case, if Bluetooth is enabled on the device.
5. Operating Instructions
5.1 Power On/Off
- Power On: Open the charging case lid, or long-press the touch control area on both earphones for a few seconds.
- Power Off: Place the earphones back into the charging case and close the lid, or long-press the touch control area on both earphones for several seconds until they power off.
5.2 Music Playback
- Play/Pause: Tap the touch control area on either earphone once.
- Next Track: Double-tap the touch control area on the right earphone.
- Previous Track: Double-tap the touch control area on the left earphone.
- Volume Up: Triple-tap the touch control area on the right earphone.
- Volume Down: Triple-tap the touch control area on the left earphone.
5.3 Call Management
- Answer Call: Tap the touch control area on either earphone once.
- End Call: Tap the touch control area on either earphone once during a call.
- Reject Call: Long-press the touch control area on either earphone for 2 seconds.
5.4 Voice Assistant
- Activate Voice Assistant: Long-press the touch control area on either earphone for 2 seconds (when not on a call).
6. Charging
6.1 Charging the Earphones
Place the earphones into the charging case. They will automatically begin charging. The indicator lights on the earphones will show their charging status.
6.2 Charging the Case
Connect the USB charging cable to the charging port on the case and to a 5V/1A power adapter. The indicator light on the case will show the charging progress. A full charge typically takes approximately 1-2 hours.
7. Maintenance
- Clean the earphones and charging case regularly with a soft, dry cloth.
- Avoid using abrasive cleaners or solvents.
- Keep the charging contacts on both the earphones and the case clean and dry to ensure proper charging.
- Store the earphones in their charging case when not in use to protect them and maintain battery life.
- Avoid extreme temperatures and humidity.
8. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Earphones not pairing |
|
| No sound from one earphone |
|
| Charging case not charging |
|
9. Specifications
- Model: ULTRASOUNDWH
- Brand: Celly
- Connectivity: True Wireless (Bluetooth)
- Color: White
- Dimensions (L x W x H): 50 x 50 x 28 cm (Note: These dimensions likely refer to packaging or the charging case, not individual earphones.)
- Weight: 130 grams
- Microphone: Integrated
- Origin: United States of America
10. Warranty and Support
For detailed warranty information, technical support, or customer service inquiries, please refer to the documentation included with your Celly Ultrasound ULTRASOUNDWH earphones. You can also visit the official Celly website or contact their customer support directly for assistance.





