Aukey TWS EP-T21 Earbuds Manual and Pairing Instructions


Aukey Technology Co., Ltd. |
Building P07, South China City Electronics Trading Center,
Longgang District, Shenzhen, Guangdong, 518111, China

Aukey TWS EP-T21 Earbuds - ALL Symbols

Thank you for purchasing the AUKEY EP-T21 True Wireless Earbuds. Please read this user manual carefully and keep it for future reference. If you need any assistance, please contact our support team with your product model number and Amazon order number.

Package Contents

True Wireless Earbuds Charging Case Three Pairs of Ear-Tips (S/M/L) Micro-USB Cable Quick Start Guide User Manual Warranty Card

Product Diagram

Aukey TWS EP-T21 Earbuds - Product Diagram


Aukey TWS EP-T21 Earbuds - Specifications

Getting Started

Fully charge the charging case before first use. To charge, connect the case to a USB charger or charging port with the included Micro-USB cable. When the LED charging indicator turns off, the case is fully charged. Charging takes around 2 hours, and after being fully charged, the case can fully charge the earbuds 7 times. The earbuds should be stored in the case when not in use. When the earbuds are charging in the case (with the case itself not charging), the LED indicators on the earbuds will turn solid red. When the indicators turn green for 1 minute and then turn off, the earbuds are fully charged.

Aukey TWS EP-T21 Earbuds - Charging

Turning On / Off

Aukey TWS EP-T21 Earbuds - Turning On Off

Starting with the earbuds in the case:

  1. Take the left and right earbuds out of the case. They will turn on automatically and connect with each other within 5 seconds
  2. After the earbuds have connected successfully, the LED indicators on the earbuds will flash green and red. This indicates they are ready to pair
  3. Turn on the pairing function on the device you want to pair with the earbuds
  4. From the list of available devices, find and select “AUKEY EP-T21”
  5. If a code or PIN is required for pairing, enter “0000”

Regular Use After Pairing
Once the earbuds are successfully paired with your device, they can be switched on and off as follows:

  • Take the earbuds out from the charging case and they will turn on automatically
  • To power off, put the earbuds back into the charging case and they will begin charging

Using the Left/Right Earbud Only
Starting with the earbuds in the case:

  1. Take the left/right earbud out
  2. Turn on the pairing function on the device you want to pair with the earbud
  3. From the list of available devices, find and select “AUKEY EP-T21”


  • When you turn on the earbuds, they will automatically reconnect to the last-paired device or enter pairing mode if no paired device is found
  • To clear the pairing list, remove both earbuds from the charging case, tap and hold the touch-sensitive panel on both earbuds for 10 seconds
  • In pairing mode, the earbuds will automatically turn off after 5 minutes if no devices are paired
  • If one of the earbuds has no sound output, put both earbuds back into the charging case and take them out again
  • The maximum wireless operating range is 10m (33ft). If you exceed this range, the earbuds will disconnect from your paired device. The connection will be re-established if you re-enter the wireless range within 5 minutes. The earbuds will automatically reconnect to the last paired device. To connect with other devices, refer to the previous pairing steps

Controls & LED Indicators

Streaming Audio
Once paired, you can wirelessly stream audio from your device to the earbuds. Music will automatically pause when you receive an incoming phone call and resume once the call has ended.

Aukey TWS EP-T21 Earbuds - Controls & LED Indicators
Aukey TWS EP-T21 Earbuds - Controls & LED Indicators 1


The earbuds are on, but not connecting to my device For the earbuds and your device to establish a connection, you need to put them both in pairing mode. Please follow the instructions in the Pairing section of this manual.
I’ve connected the earbuds with my smartphone but can’t hear any sound
Double-check the volume level on your smartphone and the earbuds. Some smartphones require you to set up the earbuds as an audio output device before the audio can be transmitted. If you’re using a music player or other device, please make sure it supports the A2DP profile.

The sound isn’t very clear or the caller can’t hear my voice clearly
Adjust the volume on your smartphone and the earbuds. Try moving closer to your smartphone to rule out the possibility of interference or wireless range-related issues.

What’s the wireless range of the earbuds?
The maximum range is 10m (33ft). However, the actual range depends on environmental factors. For optimal performance, keep your device connected within a range of roughly 4m to 8m and make sure that there are no major obstacles (like reinforced steel walls) between the earbuds and your device.

The earbuds won’t turn on
Try charging the earbuds for a while. If the earbuds still won’t power on, please contact our support team at the email address given in Warranty & Customer Support.

I put the earbuds back in the charging case, but the earbuds are still connected
In this case, the charging case is likely to be out of power. You will need to charge the case.

Product Care & Use

  • Keep away from liquids and extreme heat
  • Don’t use the earbuds at high volume for extended periods, as this may cause permanent hearing damage or loss

Warranty & Customer Support

For questions, support, or warranty claims, contact us at the address below that corresponds with your region. Please include your Amazon order number and product model number.

Amazon US orders:
Amazon EU orders:
Amazon CA orders:
Amazon JP orders:

*Please note, AUKEY can only provide after-sales service for products purchased directly from AUKEY. If you have purchased from a different seller, please contact them directly for service or warranty issues.

FCC Information for Users

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the 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.
  2. This device must accept any interference received, including interference that may cause undesired operation.

NOTE: 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 against harmful interference in a residential installation.

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following 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.

This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment.

CE Statement

Max RF power level:
BT classic (2402–2480MHz): 2.1dBm
RF exposure assessment has been performed to prove that this unit will not generate the harmful EM emission above the reference level as specified in EC Council Recommendation (1999/519/EC).

Excessive sound pressure from earphones and headphones can cause hearing loss.
Hereby, Aukey Technology Co., Ltd. declares that the radio equipment type (True Wireless Earbuds, EP-T21) is in compliance with Directive 2014/53/EU.

Notice: This device may be used in each member state of the EU.

Aukey TWS EP-T21 Earbuds Manual and Pairing Instructions – Download [optimized]
Aukey TWS EP-T21 Earbuds Manual and Pairing Instructions – Download

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