Introduction
The Csasan J90 Pro Wireless Earbuds offer an advanced audio experience with Bluetooth 5.3 technology, extended playtime, and clear call quality. Designed for comfort and durability, these in-ear earphones are suitable for various activities, from workouts to daily commutes.
Image: The Csasan J90 Pro Wireless Earbuds in their charging case, showcasing the LED display.
What's in the Box
Your Csasan J90 Pro package includes the following items:
- 2 x J90 Pro Bluetooth Earbuds
- 1 x Charging Case
- 1 x USB-C Cable
- 3 x Pairs of Ear Caps (S, M, L)
- 1 x User Manual
Setup Guide
1. Charging the Earbuds and Case
Before first use, ensure both the earbuds and the charging case are fully charged. The charging case features an LED display that shows the remaining battery level of the case and the charging status of each earbud.
- Connect the provided USB-C cable to the charging port on the case and a power source.
- The LED display will indicate charging progress. A full charge for the case takes approximately 1.5 hours.
- Place the earbuds into the charging case. They will automatically begin charging.
Image: The charging case with its LED display showing battery levels for the case and individual earbuds.
2. Pairing with Your Device
The J90 Pro earbuds utilize Bluetooth 5.3 for a fast and stable connection. They feature one-step pairing for convenience.
- Ensure Bluetooth is enabled on your smartphone, laptop, or other compatible device.
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your device, search for Bluetooth devices and select "J90 Pro" from the list.
- Once connected, you will hear a confirmation prompt, and the earbuds are ready for use.
Image: Visual representation of the one-step pairing process with a smartphone, showing the earbuds automatically connecting upon opening the case.
Operating Instructions
The J90 Pro earbuds feature sensitive touch controls for easy management of calls and music playback.
Music Playback
- Play/Pause: Tap once on either earbud.
- Next Song: Tap twice on the right earbud.
- Previous Song: Tap twice on the left earbud.
- Volume Up: Press and hold the right earbud.
- Volume Down: Press and hold the left earbud.
Call Management
- Answer Call: Tap once on either earbud.
- End Call: Tap once on either earbud during a call.
- Reject Call: Press and hold either earbud for 2 seconds.
Voice Assistant
- Activate Voice Assistant: Triple tap on either earbud.
Image: Detailed diagram illustrating the touch control functions for music, calls, and voice assistant.
Maintenance
To ensure the longevity and optimal performance of your Csasan J90 Pro Wireless Earbuds, follow these maintenance guidelines:
- Cleaning: Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth. Avoid using abrasive materials or harsh chemicals.
- Water Resistance: The earbuds feature an IPX7 waterproof rating, meaning they can withstand splashes, sweat, and rain. However, they are not designed for submersion in water or use during swimming. Ensure the charging port is dry before charging.
- 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.
- Ear Caps: Periodically remove and clean the ear caps. Replace them if they become worn or damaged to maintain optimal fit and sound quality.
Troubleshooting
If you encounter issues with your J90 Pro earbuds, try the following common troubleshooting steps:
| Problem | Solution |
|---|---|
| Earbuds not pairing/connecting |
|
| Only one earbud working |
|
| Low volume or poor sound quality |
|
| Charging issues |
|
Specifications
| Model Name | J90 Pro |
| Brand | Csasan |
| Connectivity Technology | Wireless (Bluetooth 5.3) |
| Audio Driver Type | Dynamic Driver (13mm) |
| Frequency Range | 20 Hz - 20,000 Hz |
| Battery Life | Up to 40 Hours (with charging case) |
| Single Charge Playtime | Up to 8 Hours |
| Charging Time | Approx. 1.5 Hours (case) |
| Water Resistance Level | IPX7 Waterproof |
| Control Method | Touch |
| Earbud Weight | 4g (each) |
Warranty and Support
For warranty information and customer support, please refer to the official Csasan website or contact their customer service directly. Keep your purchase receipt for any warranty claims.
Common support inquiries include:
- Product registration
- Technical assistance
- Replacement parts
- Warranty claims



