TRANSFORMERS TF-T28 True Wireless BT Earphones User Manual

TF-T28
True wireless BT Earphones
-User manual-

Packing list

| Charging compartment x1| | Earphone x2
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| Instruction manual & certificate of conformity x1| | Type-C Charging cable x1

Product diagram

Tips

1. Do not attempt to disassemble or replace any parts inside the product, except for the operation methods specified in the manual.
2. Do not put the product into water or any other liquid, as this product is not designed to be waterproof.
3. If any liquid accidentally enters the product, please immediately disconnect and remove the product.
4. To avoid electric shock, please ensure that your hands are not wet when installing or uninstalling the product.
5. Please do not place this product near a heat source or directly expose it to a fire source.
6. Do not place this product in an environment with strong electromagnetic force, otherwise it may cause product malfunction.

Product specifications

Bluetooth version: 5.4
Receiving distance: ≥10M
Speaker diameter: φ13mm
Speaker impedance: 32Ω+15%
Music time: about 5 hours
Headphone battery capacity: 30mAh/3.7V
Control method: touch operation
Microphone: -38dB±1
Speaker power: 5nW

Charging compartment specifications

Battery capacity: 200mAh/3.7V
Charging time: ≤1.5H
Rated input: 5V 200mA
(All technical information is subject to actual performance)
To charge the charging case, use the Type-C charging cable to connect the charging case to the 5V power adapter.
Warm reminder: When the battery power of the headset is lower than 3.4V, the low battery reminder “battery low” will start to be broadcast (reminder every 1 minute).

LED Indicator lights and warning sounds

charged long on
Charging compartment low power| Charging compartment low battery white light flashing

Product operation instructions

1. Power on
   Method 1: Open the lid and the earphones will automatically turn on;
   Method 2: Press and hold the MFB button on the earphones for 3 seconds to turn on the device.

2. Power off
   Method 1: Put the earphones into the charging compartment and automatically shut them off;
   Method 2: If the earphones are not connected to the device within 3 minutes, they will automatically shut down.

3. Pairing
   Step 1: Pair left and right earphones: Remove the earphones from the charging compartment and automatically pair them left and right.
   Step 2: After the left and right earphones are automatically paired successfully, they enter pairing mode and wait for the earphones to connect to the device.
   Step 3: Turn on the Bluetooth function of the device, select “TF-T28” to connect, and if the device is not connected within 3 minutes, it will automatically shut down.

Restore factory settings

1. After the headset is turned on and not connected to the device, click any headset function button 5 times in succession to restore the factory settings and shut down.
2. When the headset is connected to the device, click any headset function button 5 times continuously, press and hold any headset function button for 10 seconds within 3 seconds, restore the factory settings and turn off the phone.

Touch operation

• Normal Mode
  Voice Assistant: Long press the function button on the left ear for 2 seconds to activate the voice assistant
  Volume increase: click the right earphone function key (maximum prompt sound “dong dong”)
  Volume reduction: Click the left earphone function button

• Music playback mode
  Play/Pause: Double click the left/right headphone function keys
  Previous song: Three clicks on the left earphone function button
  Next track: Three clicks on the right earphone function button

• Call mode
  Answer incoming call: Double click the left/right headphone function button
  End call: Double click the left/right headphone function key
  Reject incoming call: Long press the left/right headphone function button for 2 seconds

• Game/Music Mode Switching
  Game mode: Long press the right earphone function button for 2 seconds.(Voice prompt: “Game mode”)
  Music mode: Long press the right ear function button for 2 seconds.(Voice prompt: “Music mode”)

Name and content of harmful substances in the product

This table is prepared according to the provisions of SJ/T11364
Ο: Indicates that the content of the hazardous substance in all homogeneous materials of the component is below the limit requirements specified in GB/ T26572.
X: Indicates that the content of the hazardous substance in at least one homogeneous material of the component exceeds the limit requirements specified in GB26572.
Parts marked with “X” in the table cannot be substituted for hazardous substances due to the limitations of global technological development.
This form is prepared in accordance with the provisions of SJ/T11364 Printed Circuit Board Components*: Includes printed circuit boards and their parts, electronic components, and so on;
Depending on the product model, the product you purchase may not contain all of the above components.
Electrical and electronic products sold in the People’s Republic of China must be marked with this symbol, and the number inside the symbol represents the environmental protection use period of the product under normal use.

Warranty Statement

DISCLAIMER
No warranty, representation of position or other implication of any kind is made in this manual.
The products, specifications and information mentioned in this manual are for reference only and are subject to change without notice.
Warranty Statement.
The products attached hereto are warranted as follows: If the product is damaged due to defects in quality under normal use within twelve (12) months from the date of purchase, the product will be repaired free of charge if it can be repaired, or replaced free of charge if it cannot be repaired as confirmed by the manufacturer, and the product will continue to be covered by the warranty for the remainder of the warranty period (a minimum of not less than 30 days) after the product is repaired or replaced. After repair or replacement, the product will continue to enjoy the warranty during the remaining warranty period (at least 30 days).
The date of purchase is based on the date of the sales invoice. If the date of purchase cannot be determined, the warranty period will be calculated on the basis of thirteen (13) months from the date of manufacture of the product.
For warranty claims, please call the product service hotline first and follow our instructions. To claim the warranty, you will need to provide a valid sales invoice that is accurate, complete and legibly filled out. The above warranty does not apply to the following.

1. Exceeding the validity period of the three packages:.
2. Altered warranty card, product code does not match the product body
3. Failure or damage caused by misuse, abuse or improper transportation, use, maintenance or storage.
4. Failure or damage caused by force majeure (e.g. earthquake, war, fire, etc.) or accidents
5. Damage to zippers, towers, or buckles due to excessive force
6. Unraveling or tearing due to overloading.
7. Any damage caused by sharp objects
8. Products that show signs of burns or flooding.
9. Damage caused by unauthorized modification.
10. Aging, discoloration, wear and tear, cracks and other wear and tear that occurs during normal use of the product.
11. This warranty will be void if the original labeling of the product is altered or destroyed.

The product and the accompanying materials are complete and intact appearance is not the scope of the warranty, you should receive the product on-site inspection and any discrepancies to raise objections.
The above warranty is our entire warranty in respect of the product and applies only within mainland China.
Nothing in this document affects the rights of consumers which cannot be excluded or restricted under the law.
Service Supervision Hotline:400-885-8808

Warranty card

Dear user, this warranty card is a proof of your future warranty application. Please cooperate with the seller to fill it out and keep it properly for future use!

User information

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Telephone| | Postal Code|
mail address| | |

Products

product name| | Model|
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Product barcode/ number/batch number| | |

Seller Information

User Name| | |
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Address| | |
Telephone| | Postal Code|
Sale date| | Invoice number|
Remarks|

FCC Warnning:
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection againstharmful interference in a residential installation. This equipment generates, uses and can radiateradio frequency energy and, if not installed and used in accordance with the instructions, maycause harmful interference to radio communications. However, there is no guarantee thatinterference will not occur in a particular installation. If this equipment does cause harmfulinterference to radio or television reception, which can be determined by turning the equipmentoff and on, the user is encouraged to try to correct the interference by one or more of thefollowing measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1)This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 0cm between the radiator and your body.

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