1. Introduction
Thank you for choosing the TRAUSI i27 Wireless Earbuds. These earbuds are designed to provide a superior audio experience with advanced features such as Bluetooth 5.4 connectivity, IPX7 waterproofing, and a comfortable, secure fit. This manual will guide you through the setup, operation, and maintenance of your new earbuds to ensure optimal performance and longevity.
2. What's in the Box
- i27 Wireless Earbuds (2 units)
- Wireless Charging Case (1 unit)
- Type-C Charging Cable (1 unit)
- Eartips with 3 Sizes (S, M, L)
- User Manual (1 unit)
3. Product Overview

The TRAUSI i27 Wireless Earbuds and their charging case, showcasing the sleek design and digital battery display.

Enjoy extended listening with up to 6 hours of playtime per earbud and an impressive 54 hours total with the charging case.

The soft, ultra-light earhook design ensures a secure and comfortable fit, perfect for active lifestyles. Includes S/M/L silicone eartips for personalized comfort.

Experience rich, detailed audio with powerful dynamic drivers for an immersive listening experience.

Effortless one-step pairing with Bluetooth 5.4 ensures fast and stable connection to your devices.

Intuitive touch controls allow for easy management of music, calls, and voice assistants.
Official Product Video
Official product video demonstrating the features and usage of the TRAUSI i27 Wireless Earbuds.
4. Setup
4.1 Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Connect the provided Type-C cable to the charging port on the case and plug the other end into a USB power source. The LED percentage display on the case will indicate the charging status. A full charge for the case takes approximately 1.5 hours. A 10-minute quick charge provides 2 hours of playback.
4.2 Pairing with Your Device
- Ensure the charging case has sufficient power.
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your device (smartphone, tablet, laptop), enable Bluetooth.
- Search for available Bluetooth devices and select "i27" from the list.
- Once connected, you will hear a confirmation tone, and the earbuds' indicator lights will turn off.
- The earbuds support dual-channel transmission for faster speeds and better stability, working seamlessly with iOS, Android, and Windows devices.
5. Operating Instructions
5.1 Smart Touch Controls
The TRAUSI i27 earbuds feature intuitive touch controls for easy management of your audio and calls:
- Play/Pause: Single tap on either earbud.
- Next Track: Double tap on the right earbud.
- Previous Track: Double tap on the left earbud.
- Volume Up: Triple tap on the right earbud.
- Volume Down: Triple tap on the left earbud.
- Answer/End Call: Single tap on either earbud during an incoming call or active call.
- Reject Call: Press and hold either earbud for 2 seconds during an incoming call.
- Activate Voice Assistant (Siri/Google Assistant): Press and hold either earbud for 3 seconds.
5.2 Wearing the Earbuds
Gently place the earbud into your ear canal and adjust the earhook over your ear until it feels secure and comfortable. Experiment with the different sized eartips (S, M, L) to find the best fit for optimal sound quality and comfort.
6. Maintenance
6.1 Cleaning
Regularly clean your earbuds and charging case to maintain optimal performance and hygiene. Use a soft, dry, lint-free cloth to wipe down the surfaces. For the eartips, remove them from the earbuds and clean with a mild soap solution if necessary, then rinse thoroughly and allow to air dry completely before reattaching.
6.2 Water Resistance (IPX7)
The TRAUSI i27 earbuds are IPX7 waterproof, meaning they are resistant to sweat, rain, and splashes. They are suitable for workouts and outdoor activities. Note: They are not designed for submersion in water or for use during swimming. Ensure the charging port is dry before charging.
6.3 Storage
When not in use, store the earbuds in their charging case to protect them from dust, damage, and to keep them charged. Store the case in a cool, dry place away from extreme temperatures.
7. Troubleshooting
| Issue | Possible Solution |
|---|---|
| Earbuds not pairing | Ensure earbuds are charged. Turn off and on Bluetooth on your device. Forget "i27" from your device's Bluetooth list and re-pair. |
| No sound from one earbud | Place both earbuds back into the charging case, close the lid, wait a few seconds, then take them out again to re-sync. Check device's audio output settings. |
| Charging case not charging | Ensure the Type-C cable is securely connected to both the case and the power source. Try a different charging cable or power adapter. |
| Poor sound quality | Ensure earbuds are clean and eartips are properly fitted. Move closer to your device to avoid interference. |
| Touch controls not responding | Ensure your fingers are clean and dry. Try restarting the earbuds by placing them in the case and taking them out. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | i27 |
| Connectivity Technology | Wireless |
| Wireless Communication Technology | Bluetooth |
| Bluetooth Version | 5.4 |
| Bluetooth Range | 15 Meters (50 feet) |
| Water Resistance Level | IPX7 Waterproof |
| Control Type | Touch Control |
| Earpiece Shape | Hook (Over Ear) |
| Noise Control | Environmental Noise Cancellation |
| Carrying Case Battery Capacity | 400 Milliamp Hours |
| Carrying Case Battery Charging Time | 1.5 Hours |
| Item Weight | 1 Grams (each earbud) / 0.035 ounces (total) |
| Material | Plastic |
| Compatible Devices | iPhone, Android, Cellphones, Desktops, Laptops, Tablets |
| Specific Uses For Product | Sports, Workouts, Running, Fitness, Travel, Cycling, Gym, Outdoor, Music, Entertainment, TV Series, Gaming, Office Meetings, Professional, School |
9. Warranty and Support
TRAUSI products are manufactured to the highest quality standards. For warranty information and customer support, please refer to the contact details provided on the product packaging or visit the official TRAUSI website. Please retain your proof of purchase for any warranty claims.