KORSKR B0CDSJ3NNS Bluetooth Sport Wireless Earbuds User Guide
- June 12, 2024
- KORSKR
Table of Contents
KORSKR B0CDSJ3NNS Bluetooth Sport Wireless Earbuds
THANKS FOR YOUR ORDER
Thank you for purchasing i21 Sport Wireless Earbuds. Please read the
instructions carefully before using. It will help you know how to operate this
item properly and enjoy authentic sound performance.
WARRANTY
If there is any issue with the product, please feel free to contact us by
email at support@korskr.com, and you may also reach out to us via Amazon
Message.
We’ll try our best to give you a satisfactory answer.
- Customer Service Team: support@korskr.com
- Website: www.korskr.com
PRODUCT DETAILS
- Battery display of charging case
- 8 Power status of earbuds
- Charging pins
- Charging contacts
- Touch sensor/button
- Earbud indicator
- Microphone
USAGE TIPS
- Prior to first use, please remove the insulation stickers /tapes on these earbuds.
- For your best audio and wearing experience, it’s recommended to wear the left and right earbud properly and choose the eartips that fits in your ears.
- Please clean the charging contacts after using the earbuds on a regular basis to avoid charging failed.
HOW TO TURN ON/OFF EARBUDS
POWER ON:
- Take out the earbuds from the charging case, and they will automatically power on.
- When these earbuds turn off, please press and hold the touch sensor of the earbuds for 3-5 seconds. And then the green lights on the earbuds blink with a voice prompt power on
POWER OFF
- The earbuds will switch off when put into the charging case.
- Keep the touch button pressed for 3-Ss, and the LED indicator flashes with a sound prompt “power off”.
Notice If the earbuds disconnect to the device, they will power off automatically after 5 mins.
HOW TO CONNECT
DUAL MODE
- Taking these earbuds out of the charging case, and then they will automatically power on, and pair with each other after a few seconds.
- When the earbuds are pairing with each other, the green lights blink quickly. If they paired, the green lights blink slowly with a voice prompt “TWS Connected”.
- Turn on Bluetooth on your device to search for “i21 “. Select it to pair and there will be a sound prompt “Connected”. And then the green lights on the earbuds go out.
Notice Prior to first use, both earbuds should be taken out of the case to make sure that they pair with each other before they try to connect to your device.
MONO MODE
- Take an earbud out of the case and it will automatically power on.
- Turn on Bluetooth in your device settings to search for “i21 “, and then click it to connect to the device and there will be a sound prompt “Connected”.
SMART TOUCH CONTROL
Answer/Hang Up The Call
Tap the touch button once
Reject The Call
Keep the touch button pressed for 2s
Cancell The Call
Tap the button once when dialing call
Activate Siri/Voice Assistant
Triple-tap the button to activate it
MUSIC TIME
Play/Pause
Tap the touch button once to play/pause the music.
Previous/Next Song
Keep pressing the touch button for 1s and release it (“L” for previous song,
“R” for next song)
Volume+/-
Double-tap the touch button to adjust the volume (“L” for decreasing, “R” for
increasing)
HOW TO CHARGE
Charging the earbuds
When the earbuds are not being used, place them in the charging case and the
case will automatically begin charging the earbuds.
Charging status of the charging case
- When the case is charging: the single digit of the LED digital display flashes as the power increases.
- When the case is fully charged: the number on the digital display changes to 100%.
- When the charging cable is unplugged: the digital display goes out in 15 seconds.
The status of led digital display
- The number in percentage tells the remaining power of the charging case rather than these earbuds.
- The led bars on both sides of the number in percentage refers to the power status of the earbuds. Note: The battery of earbuds can’t be seen directly from the LED digital display.
Low battery reminder
These earbuds have a voice prompt “Battery Low” when in low battery. Please
put them back in the case, and then the case will charge for these earbuds
automatically.
When the number shown in the digital display close to 0%, please use the USB
Type-C cable to charge it.
TROUBLESHOOTING
-
The earbuds could not connect to the device.
-
Make sure your device supports Bluetooth. Delete paired records on all your devices and then try to connect to the device.
-
If it still doesn’t work, please try to connect to other devices to check if it works normally.
-
These earbuds didn’t work.
-
Make sure the earbuds are correctly placed in the case.
-
Check the remaining power of the charging case.
-
Clean the charging contacts with a cotton swab to check if the green lights on the earbuds blink or not.
-
Keep the touch sensor pressed for 5s, then put the earbuds back in the case to check if they blink or not.
-
The case could not be charged.
Reconnect both ends of the USB-C cable firmly. If not, please charge with diff-,t cables to check if it works normally. When the charging cable is plugged, check if the digit on the digital display flashes or not. -
The earbuds could not be charged. Please check if the charging case is under charged. If yes, please try to clean the charging contacts and charging pins. If not, please make it fully charged for a better experience.
-
The earbuds have no sound.
-
Clean the charging contacts to check if they work fine or not.
-
Pairing unsuccessfully between both earbuds. Please reset these earbuds. Both earbuds should be taken out of the case to make sure they pair with each other before they connect to your device.
-
How to reset these earbuds?
Put them into the charging case and close the lid. Delete paired records on all your devices. Take the earbuds out of the case, and they will pair with each other with a voice prompt “TWS Connected”.
And then turn on Bluetooth on your device, search for “i21” and select it to connect to your device. -
How to connect to another device?
-
Operating principle: After the first connection, these earbuds will automatically connect to the last paired device when reboot.
-
If you want to connect to the second device, please make sure you’ve turned off Bluetooth on the first device. So that the earbuds can connect to another device successfully.
-
What to do if one side of earbuds does not pair?
If one earbud is not working, it’s probably that both earbuds don’t pair with each other successfully. Please put them back into the charging case and take both earbuds out at the same time.
There will be a voice prompt “TWS Connected”. They will pair automatically. Then turn on the “Bluetooth” switch for connection. -
Short communication distance, sound interruption, distortion or noise.
Solutions: -
Check if the surrounding radio waves and electromagnetic waves interfere with each other. Please check by turning off the power of wireless devices, microwave ovens, etc.
-
Shielding check between the machine and the other party’s
Bluetooth device (human body, metal, wall, bag, etc.). -
In the case of streaming media such as music distribution services, cloud playback, radio, etc., due to the communication speed you use, there may be sound interruption, distortion and noise.
-
For smartphones, etc., please also check the following: In the power saving mode, the radio wave may be set to be weak. Please turn off the power saving function to check.
-
When other applications are running, when operating data, during communication, when Sound interruptions, distortion and noise may occur during terrestrial sync.
WARNING
-
When the earbuds are idle for an extended period of time, it’s recommended to charge both earbuds and charging case every two weeks to avoid battery damage.
-
Do not disassemble or modify which may cause malfunction or electric shock.
-
If you can’t hear your surroundings, do not use it in a dangerous place. Accident or injury may result.
-
Do not dispose of with general garbage(non-burnable garbage).
May cause fire or explosion. -
Do not swallow these earbuds.lt can stick to the intestinal wall and cause injury or disease.
-
Do not use the product near medical equipment. Radio waves can affect pacemakers and medical electrical equipment.
PACKING LIST
PRODUCT PARAMETERS
| Model: | i21 |
|---|---|
| Chips Version: | V5.3 |
| Battery Type: | Lithium-Ion |
| Input: | DC5V/1A |
| Speaker Type: | Cl>10mm |
| Supported Codecs: | AAC/SBC |
| Bluetooth Profiles Supported: | HFP/A2DP/AVRCP |
| Operating Frequency: | 2.40 GHZ-2.48 GHZ |
| RF Sensitivity: | -92dBm |
| WorkilgT8111)81ature Ra,ge: | 32°F-104°F / 0-40°C |
| Maximum Transmission Range: | 49ft/15m (Open Area) |
Email: support@korskr.com
Website: www.korskr.com