Introduction
This manual provides detailed instructions for the Air31 TWS Wireless Bluetooth Earbuds. Please read this manual carefully before using the product to ensure proper operation and to maximize your listening experience.
The Air31 TWS earbuds offer premium HiFi stereo sound, a convenient LED digital charging case, comfortable in-ear design, and intuitive touch controls, compatible with a wide range of Bluetooth-enabled devices.
Package Contents
Ensure all items are present in the package:
- Air31 TWS Wireless Bluetooth Earbuds (Left and Right)
- Wireless Charging Case
- Charging Cable
- User Manual (this document)
Product Overview

Figure 1: Air31 TWS Wireless Bluetooth Earbuds in their charging case. The case features a clear lid and an LED digital display indicating the battery percentage (90% shown) and individual earbud charging status (L and R indicators). One earbud is partially visible, extending from the case.
The Air31 TWS earbuds are designed for portability and ease of use. The transparent charging case features an integrated LED display that shows the remaining battery percentage of the case and the charging status of each earbud. The earbuds themselves are compact, in-ear style, and equipped with touch-sensitive controls.
Setup
1. Initial Charging
- Place both earbuds into the charging case.
- Connect the charging cable to the charging port on the case and a USB power source (e.g., computer, wall adapter).
- The LED display on the case will show the charging progress. A full charge takes approximately 1.5 hours.
- Once fully charged, the display will indicate 100%. Disconnect the charging cable.
2. Pairing with a Device
- Ensure the earbuds are charged and inside the charging case.
- Open the charging case lid. The earbuds will automatically enter pairing mode, and their indicator lights will flash.
- On your Bluetooth-enabled device (smartphone, tablet, laptop), go to the Bluetooth settings.
- Search for available devices and select "Air31 TWS" from the list.
- Once connected, a voice prompt will confirm successful pairing, and the earbud indicator lights will turn off.
- For subsequent use, the earbuds will automatically connect to the last paired device when removed from the case.
Operating Instructions
Touch Controls
The Air31 TWS earbuds feature intuitive touch controls on each earbud for easy management of audio and calls.
| Action | Function |
|---|---|
| Single Tap (Left or Right Earbud) | Play/Pause Music, Answer/End Call |
| Double Tap (Left Earbud) | Previous Track |
| Double Tap (Right Earbud) | Next Track |
| Triple Tap (Left or Right Earbud) | Activate Voice Assistant (Siri, Google Assistant) |
| Long Press (2 seconds, Left or Right Earbud) | Reject Incoming Call |
| Long Press (3 seconds, Left or Right Earbud) | Power On/Off Earbuds (when not in case) |
Wearing the Earbuds
Gently insert each earbud into the corresponding ear (L for left, R for right). Adjust for a comfortable and secure fit to ensure optimal sound quality and passive noise cancellation.
Maintenance
- Cleaning: Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth. Do not use harsh chemicals or abrasive materials.
- 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 direct sunlight and extreme temperatures.
- Water Resistance: The earbuds are waterproof (specific IP rating not provided, assume splash-resistant). Avoid submerging them in water or exposing them to heavy rain. Dry them thoroughly if they get wet.
- Battery Care: To prolong battery life, avoid fully discharging the earbuds and charging case frequently. Charge them regularly, even if not in constant use.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds not pairing with device. | Earbuds not in pairing mode; Bluetooth off on device; previously paired device interfering. |
|
| Only one earbud playing sound. | One earbud not connected; low battery on one earbud. |
|
| Earbuds not charging. | Charging cable faulty; power source issue; dirty charging contacts. |
|
| Poor sound quality. | Improper fit; low battery; interference; dirty earbud mesh. |
|
Specifications
| Feature | Detail |
|---|---|
| Model Name | Air31 TWS |
| Connectivity Technology | Bluetooth 5.1 |
| Ear Placement | In Ear |
| Form Factor | In Ear |
| Control Type | Touch Control |
| Noise Control | Passive Noise Cancellation |
| Frequency Response | 20 Hz (Note: Only lower bound provided in source) |
| Sensitivity | 95 dB |
| Impedance | 32 Ohm |
| Charging Time | Approximately 1.5 Hours |
| Material | Plastic |
| Compatible Devices | Cellphones, iOS, Laptops, Tablets |
| Manufacturer | Krezi Store |
Warranty and Support
For warranty information and customer support, please refer to the documentation provided with your purchase or contact the seller directly.
Seller: Krezi store
For further assistance, please visit the product page on Amazon: Air31 TWS Earbuds Product Page





