1. Introduction
This manual provides detailed instructions for the safe and effective use of your Csasan J90 Pro Wireless Earbuds. Please read this manual thoroughly before using the product and retain it for future reference.
Image: The Csasan J90 Pro wireless earbuds, shown in sky blue, resting inside their open charging case. The case features an LED display indicating battery levels.
2. What's in the Box
Verify that all components are present in the package:
- 2x Wireless Headphones (Left/Right)
- 1x Fast Charging Case
- 1x Type-C Charging Cable
- 3x Pairs of Earplugs (Sizes S, M, L)
- 1x Instruction Manual (This document)
Image: A visual representation of the product packaging contents, including the earbuds, charging case, USB-C cable, and various ear tip sizes.
3. Product Overview
3.1 Earbud Components
The earbuds feature a compact design with touch control areas and integrated microphones.
Image: A detailed view of a single earbud, highlighting the touch-sensitive control panel and the microphone location.
3.2 Charging Case
The charging case provides portable power and features an LED display for battery status.
Image: The charging case with its lid open, showing the earbuds inside and the digital LED display indicating battery percentage.
4. Setup
4.1 Initial Charging
Before first use, fully charge the earbuds and the charging case.
- Place both earbuds into the charging case.
- Connect the Type-C charging cable to the charging port on the case and to a USB power source.
- The LED display on the case will show the charging progress. A full charge takes approximately 1.5 hours.
Image: The earbuds are shown inside the charging case, which is connected via a USB-C cable, illustrating the charging process and the LED battery indicator.
4.2 Bluetooth Pairing
The earbuds utilize Bluetooth 5.3 for a stable connection.
- Ensure the earbuds are charged.
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for "J90 Pro" in the list of available devices.
- Select "J90 Pro" to connect. Once connected, a voice prompt will confirm the pairing.
- For subsequent uses, simply open the charging case, and the earbuds will automatically reconnect to the last paired device.
Image: A visual guide demonstrating the one-step pairing process, showing the earbuds in their open case and a smartphone screen displaying "J90 Pro" as a paired Bluetooth device.
5. Operating Instructions
5.1 Wearing the Earbuds
Select the appropriate ear tip size (S, M, L) for a comfortable and secure fit. Insert the earbuds into your ears and gently rotate them to ensure a snug seal.
Image: A person wearing one of the Csasan J90 Pro earbuds, demonstrating the in-ear fit.
5.2 Touch Controls
The J90 Pro earbuds feature sensitive touch controls on both the left (L) and right (R) earbuds.
| Action | Left Earbud (L) | Right Earbud (R) |
|---|---|---|
| Play/Pause Music | Tap Twice | Tap Twice |
| Next Track | Press and Hold 2s | N/A |
| Previous Track | N/A | Press and Hold 2s |
| Volume Up | N/A | Tap Once |
| Volume Down | Tap Once | N/A |
| Answer/End Call | Tap Once | Tap Once |
| Reject Call | Press and Hold 2s | Press and Hold 2s |
| Activate Voice Assistant | Tap 3 Times | Tap 3 Times |
Image: A visual guide detailing the touch control functions for both the left and right earbuds, including actions for music playback, calls, and voice assistant.
6. Maintenance
6.1 Cleaning
Regular cleaning helps maintain sound quality and product longevity.
- Use a soft, dry, lint-free cloth to wipe the earbuds and charging case.
- Do not use abrasive cleaners, alcohol, or chemical sprays.
- Gently clean the ear tips and speaker mesh with a cotton swab if necessary.
6.2 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 and direct sunlight.
6.3 Water Resistance (IP7)
The earbuds are IP7 waterproof, meaning they are protected against immersion in water up to 1 meter for up to 30 minutes. This makes them suitable for workouts and use in light rain.
Note: The charging case is NOT waterproof. Do not expose the charging case to water.
Image: A man drinking water, demonstrating the IP7 waterproof feature of the earbuds, suitable for active use.
7. Troubleshooting
If you encounter issues with your earbuds, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds not pairing/connecting | Out of range, low battery, pairing mode not active. | Ensure earbuds are charged. Place earbuds back in case, close, then open to re-enter pairing mode. Move closer to the device. Forget "J90 Pro" in device's Bluetooth settings and re-pair. |
| Only one earbud working | One earbud not connected, low battery on one earbud. | Ensure both earbuds are charged. Place both earbuds back in the case, close the lid, wait a few seconds, then open again. This often resets the connection. |
| Low volume or poor sound quality | Incorrect ear tip size, ear tips/speaker mesh blocked, low battery. | Try different ear tip sizes for a better seal. Clean ear tips and speaker mesh. Charge earbuds fully. |
| Earbuds not charging | Charging cable issue, dirty charging contacts, case low on battery. | Ensure charging cable is securely connected. Try a different USB port or cable. Clean charging contacts on earbuds and case with a dry cotton swab. Charge the case fully. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | J90 Pro |
| Bluetooth Version | 5.3 |
| Bluetooth Range | Up to 15 meters |
| Audio Driver Size | 13 mm |
| Earbud Battery Life (Single Charge) | 6-8 hours |
| Total Playtime (with Charging Case) | Up to 40 hours |
| Charging Time | Approx. 1.5 hours |
| Water Resistance Rating | IP7 (Earbuds only) |
| Noise Control | ENC Noise Cancelling Mics |
| Control Type | Touch Control |
| Compatible Devices | iOS, Android, and all Bluetooth-enabled devices |
| Included Components | 2x Wireless Headphones, 1x Fast Charging Case, 1x Type-C Charging Cable, 3x Pairs of Earplugs (S, M, L), 1x Instruction Manual |
9. Warranty and Support
9.1 Warranty Information
Csasan offers a 2-year warranty for this product. Please retain your proof of purchase for warranty claims.
9.2 Customer Service
For any questions, technical support, or warranty inquiries, please contact Csasan customer service. They offer 24-hour customer service response.
Refer to the product packaging or the official Csasan website for contact details.
You can also visit the Csasan Store on Amazon for more information.
Image: An illustration highlighting the 2-year warranty and 24-hour customer service support provided by Csasan.
