LASUNEY T21

LASUNEY T21 Bluetooth 5.0 True Wireless Earbuds User Manual

Model: T21

1. Package Contents

Please verify that all items listed below are included in your package:

  • 2 x LASUNEY T21 Bluetooth Earbuds
  • 1 x Charging Case
  • 1 x Micro USB Cable (50CM/1.6FT)
  • 1 x User Manual
  • Multiple sizes of ear tips (M size pre-installed)

2. Setup and Pairing

2.1 Initial Charging

Before first use, ensure both earbuds and the charging case are fully charged. Place the earbuds into the charging case and connect the Micro USB cable to a power source. The indicator lights on the case will show charging status.

2.2 One-Step Pairing

The LASUNEY T21 earbuds feature one-step pairing for convenience:

  1. Take both earbuds out from the charging case. They will automatically enter pairing mode.
  2. On your device (smartphone, tablet, laptop), go to Bluetooth settings.
  3. Select "Lasuney T21" from the list of available devices to connect.

Once successfully paired, the earbuds will automatically connect to your device when taken out of the charging case in the future.

Diagram showing earbuds being taken out of the charging case and a phone screen displaying Bluetooth settings with 'Lasuney T21' selected for connection.
Figure 1: One-Step Pairing Process. This image illustrates how to initiate pairing by removing the earbuds from their charging case and selecting them in your device's Bluetooth settings.

3. Operating the Earbuds

3.1 Touch Control Functions

The LASUNEY T21 earbuds utilize touch control technology. Refer to the following table for control functions:

ActionControl
Previous SongLong touch for 2 seconds on the Left earbud
Next SongLong touch for 2 seconds on the Right earbud
Play/Pause MusicDouble-tap either earbud
Answer/Hang Up CallDouble-tap either earbud
Decline Incoming CallLong touch for 2 seconds on either earbud
Diagram illustrating the touch control functions on the earbuds, including previous song, next song, Siri, play/pause, power on/off, answer/end calls, and decline calls.
Figure 2: Earbud Touch Control Overview. This image visually represents the various touch-sensitive controls available on the earbuds for managing music playback and calls.

3.2 Single and Binaural Mode

The earbuds support both single-earbud and two-earbud (binaural) modes, allowing flexible usage without re-pairing:

  • Single-earbud mode: You can use either the left or right earbud independently. Simply take one earbud out of the case and connect it to your device.
  • Switching to Binaural mode: If you are using one earbud and wish to use both, simply take the other earbud out of the charging case. It will automatically connect and switch to binaural mode.
Illustration showing how to switch between single and binaural earbud modes, with diagrams of one earbud in use and both earbuds in use.
Figure 3: Flexible Single and Binaural Mode. This diagram explains the automatic switching capability between using a single earbud and both earbuds for audio playback.

3.3 Comfortable Wearing and Portability

The in-ear design ensures a secure and comfortable fit, reducing the likelihood of falling out during activities. The compact charging case and lightweight earbuds (4g per earbud, 38g for charging case) make them easy to carry for daily use or sports.

Image showing a person wearing the earbuds comfortably while driving, with an exploded view of the earbud's internal components highlighting 3D stereo sound.
Figure 4: Ergonomic Design for Comfort. This image demonstrates the comfortable fit of the earbuds during use, emphasizing the in-ear design and sound quality.
Image showing the compact size of the charging case and earbuds, with dimensions and different ear tip sizes (L, M, S) for a secure fit, emphasizing portability.
Figure 5: Compact and Portable Design. This image highlights the small size of the earbuds and charging case, making them convenient for carrying in a pocket, along with interchangeable ear tip sizes.

4. Charging

The earbuds provide approximately 4.5 hours of playtime on a single charge. The charging case, when fully charged, can provide 4-5 additional full charges, extending the total playtime to about 25 hours. The earbuds can be fully charged within 2 hours.

Infographic showing the battery life: 4.5 hours continuous playtime, plus 4-5 times full charge from the case, totaling 25 hours super long playtime.
Figure 6: Extended Battery Life. This infographic details the impressive battery performance of the earbuds and their charging case, offering up to 25 hours of total listening time.

Important Note: If the charging case battery is depleted, the earbuds will not automatically turn off when placed inside. In this situation, long-press the Touch Control Area on each earbud for 10 seconds to manually power them off.

5. Specifications

FeatureDetail
Model NameT21
Connectivity TechnologyWireless (Bluetooth)
Bluetooth Version5.0
Control TypeTouch Control
Water Resistance LevelIPX5 Waterproof
Battery Life (Single Charge)4.5 Hours
Total Playtime (with Charging Case)Up to 25 Hours
Charging Time2 Hours
Earbud Weight4 Grams (each)
Charging Case Weight38 Grams
Product Dimensions2.7 x 0.17 x 1.28 inches
Compatible DevicesSmartphones, Tablets, Laptops (Android, iPhone)
Special FeaturesMicrophone Included, Sports and Exercise suitability

6. Troubleshooting

6.1 Resetting Earbuds (Pairing Issues)

If your earbuds fail to pair with your device or with each other, follow these steps to reset them:

  1. Ensure the Bluetooth function on your device is turned OFF.
  2. While the earbuds are in pairing mode (out of the case), triple-tap the Touch Control Area of each earbud separately.
  3. Place both earbuds back into the charging case to turn them off.
  4. Take them out from the charging case again to initiate reconnection with your device.

6.2 Pairing Timeout

The pairing mode will automatically turn off after 10 minutes if the earbuds do not connect with any device. If this occurs, repeat the pairing steps from section 2.2.

6.3 Earbuds Not Turning Off

If the charging case battery is at zero, the earbuds will not automatically turn off when placed inside. To manually turn them off, long-press the Touch Control Area on each earbud for 10 seconds.

7. Warranty and Support

LASUNEY provides 12 months of after-sales service for the T21 True Wireless Earbuds. For any inquiries, support, or to request different sizes of ear tips, please contact our customer service team.

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