Introduction
This manual provides detailed instructions for the proper use and maintenance of your Ltinist BX27 Wireless Earbuds. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
What's in the Box
Verify that all items are present in the package:
- 2x Wireless Earbuds (Left and Right)
- 1x Charging Case
- 1x Type-C Charging Cable
- 3x Pairs of Eartips (Sizes S/M/L)
- 1x User Manual (This document)

Image: The Ltinist BX27 Wireless Earbuds and charging case. The full package includes additional accessories listed above.
Product Overview
Familiarize yourself with the components of your earbuds.

Image: The Ltinist BX27 Wireless Earbuds in their charging case, displaying the earbud design and digital battery indicators.
Earbud Components
- Earhook: Flexible design for secure fit during activity.
- Eartip: Interchangeable for customized comfort (S/M/L).
- Touch Control Area: For managing playback, calls, and voice assistant.
- Microphone: Equipped with Environmental Noise Cancelling (ENC) for clear calls.
- Charging Contacts: Located on the earbuds and inside the charging case.
Charging Case
- Digital LED Display: Shows remaining battery percentage of the case and charging status of individual earbuds.
- USB-C Charging Port: For recharging the case.
Setup
1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and charging case.
- Place the earbuds into the charging case. Ensure the charging contacts align.
- Connect the provided Type-C charging cable to the charging port on the case and to a USB power source.
- The LED display on the charging case will show the battery level and charging status. A full charge for the case typically takes 1.5 hours.
- Once fully charged, disconnect the charging cable.

Image: The charging case displaying battery levels and indicating 75 hours of total playtime with the case, and 15 hours per single earbud charge.
2. Pairing with Your Device
The earbuds feature automatic pairing for convenience.
- Ensure your device's Bluetooth is enabled.
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device, search for Bluetooth devices and select "BX27" from the list.
- Once connected, you will hear a confirmation tone, and the earbuds will be ready for use.
- For subsequent uses, the earbuds will automatically connect to the last paired device when removed from the case.

Image: Visual representation of the Bluetooth 5.4 chip and a phone's Bluetooth settings screen showing the "BX27" earbuds ready for connection.
Operating Instructions
1. Wearing the Earbuds
For optimal sound quality and comfort, select the correct eartip size and adjust the earhooks.
- Choose the eartips (S/M/L) that provide the best seal and comfort for your ears.
- Gently insert the earbud into your ear canal.
- Adjust the flexible earhook over your ear to secure the earbud in place.

Image: A user demonstrating the ergonomic fit of the earbuds with earhooks, alongside an illustration of the available eartip sizes and the IP7 waterproof feature.
2. Touch Controls
The earbuds feature intuitive touch controls on the outer surface of each earbud.
| Action | Left Earbud (L) | Right Earbud (R) |
|---|---|---|
| Play/Pause | Click Once | Click Once |
| Volume Up | - | Click Once |
| Volume Down | Click Once | - |
| Next Track | - | Click Twice |
| Previous Track | Click Twice | - |
| Answer/End Call | Click Once | Click Once |
| Reject Call | Hold for 2 seconds | Hold for 2 seconds |
| Activate Voice Assistant | Click Three Times | Click Three Times |

Image: A visual guide to the touch controls on the earbuds, showing how to manage audio playback, calls, and voice assistant features.
3. Call Functions
The earbuds are equipped with ENC (Environmental Noise Cancelling) microphones for clear call quality.
- Answering/Ending Calls: Click the touch control area once on either earbud.
- Rejecting Calls: Hold the touch control area for 2 seconds on either earbud.

Image: An illustration of the ENC noise-canceling microphone technology in action, ensuring clear voice transmission during calls by reducing ambient sound.
Maintenance
Proper maintenance ensures the longevity and performance of your earbuds.
- Cleaning: Regularly clean the earbuds, eartips, and charging contacts with a soft, dry, lint-free cloth. Do not use harsh chemicals or abrasive materials.
- Water Resistance: The earbuds are IP7 waterproof, meaning they can resist sweat, rain, and minor water splashes. Do not submerge them in water or expose them to high-pressure water. Ensure earbuds are dry before placing them back in the charging case.
- 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.

Image: A visual representation of the earbuds' IP7 waterproof and sweatproof capabilities, showing resistance to various forms of moisture.
Troubleshooting
If you encounter issues, refer to the following common solutions:
- Earbuds not charging:
- Ensure the charging cable is securely connected to both the case and the power source.
- Verify that the charging contacts on the earbuds and inside the case are clean and free of debris.
- Check if the charging case itself has sufficient battery.
- Earbuds not pairing/connecting:
- Ensure Bluetooth is enabled on your device.
- Place the earbuds back into the charging case, close the lid, then open it again to re-enter pairing mode.
- Forget "BX27" from your device's Bluetooth settings and attempt to pair again.
- Ensure the earbuds are within the 48-foot Bluetooth range of your device.
- No sound or low volume:
- Adjust the volume on both your device and using the earbud touch controls.
- Ensure the earbuds are properly seated in your ears and the eartips provide a good seal.
- Check if the earbuds are connected to the correct device.
- Call quality issues:
- Ensure the microphone area on the earbuds is not obstructed.
- Move to a quieter environment if excessive background noise is present, although ENC helps reduce this.
- Check your device's call volume settings.
Specifications
| Feature | Detail |
|---|---|
| Model Name | BX27 |
| Brand | Ltinist |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.4 |
| Bluetooth Range | Up to 48 feet (approx. 15 meters) |
| Battery Life (Earbuds) | Up to 15 hours per single charge |
| Total Playtime (with Charging Case) | Up to 75 hours |
| Charging Port | USB-C |
| Water Resistance Rating | IP7 (Waterproof) |
| Audio Driver Size | 14.2mm Dynamic Driver |
| Noise Control | Environmental Noise Cancellation (ENC) for calls |
| Control Method | Touch, Voice |
| Compatible Devices | iOS, Android cellphones, TV, smart watches, PC, tablets, laptops |
| Earpiece Shape | Over Ear (with hooks) |
| Item Weight | 4.6 ounces (total package) |

Image: An exploded view illustrating the internal components of the earbud, focusing on the 14.2mm dynamic driver responsible for audio output.

Image: Visual representation of the wide compatibility of the earbuds with various Bluetooth-enabled devices.
Warranty and Support
Your Ltinist BX27 Wireless Earbuds come with a comprehensive warranty and dedicated customer support.
- Warranty Period: 2 years from the date of purchase.
- Customer Service: 24-hour customer service response is available for any inquiries or support needs.
For warranty claims or technical assistance, please refer to the contact information provided on the product packaging or the official Ltinist website.