I21 True Wireless Stereo Earphones User Manual

I21 True Wireless Stereo Earphones

Compatibility：

This product is compatible with all Bluetooth-enabled mobile phones (iOS/Android/Windows Phone), tablet PCs, smart watches, notebooks and desktop computers.

Product details

1. Charging case digital display
2. 10 Earphone digital display
3. Charging pin
4. Microphone
5. 8 Earphone indicator
6. 7 Touch Button

Usage

For the Best Audio experience, it is recommended your right size silicone earcaps and, please put your cellphones in the same side of left earphone during outdoor.

Powering ON:

• Take out the earphones from the charging case, and they will “power on”
• When the earphones are OFF, Keep the touch button of both earphones for 3-5 seconds. The Led light flashes once and with a sound prompt: “power on”.

Powering OFF:

• The earphones will switch off when put into the charger case.
• Keep the earphones touch button pressed for 3-5 seconds, until the Blue LED flashes with a sound prompt: “power off”.
  Note: If the earphones were disconnect with the device, the earphones will be power off automatically after 5mins.

Stereo Mode:

1. Taking the earbuds out of the charging box, they will auto power on. After a few seconds, the left and right earbuds will auto connect each other. When the TWS earbuds are connected to each other, the LED light will flash quickly. If they connect successfully, the earbuds LED light will flash slowly.
2. Open the bluetooth devices page inside settings. Search for “i21” and select it to pair, the Earphone lights be off after the earphones connected with device. Note: If the earphones connected the device once, and the bluetooth functions of device was open, the earphones will be reconnected with last device automatically.

Play Music:

1. Touch the button once to Pause/Play.
2. Keep press the touch button for 1 seconds and release it (“L”for previous song, “R”for next song)
3. Touch the button twice to adjust the volume(“L”for decreasing ,”R” for increasing)

Voice Assistant:

Touch the button three times to activate the Siri voice assistant

Calling:

1. When a call comes in, short press one of the touch buttons in order to answer the call or long press it to reject it.
2. During a phone call, short press the earphone button to end the call and the earphone will resume its previous working state.
3. During a call, the volume can be controlled via the mobile phone.
4. Stereo mode: both ears have voice.

Specification

• Bluetooth version: V5.1
• Voltage rating and energy capacity: 3.7V/400mAh
• Battery capacity: 2*3.7V/40mAh
• Earphone Charge time: Around 1.5hour
• Music playing time: About 5-7h*3Times
• Bluetooth profiles supported: HFP/A2DP/AVRCP
• Operating frequency: 2.40 GHZ-2.48 GHZ
• RF Sensitivity: -92dBm
• Working temperature range: -10+50
• Maximum transmission range: 15M

Packing list:

• Earphone *2
• USB cable *1
• User manual *1
• Earcaps *4(L\ S)
• Charging case *1

Important:

1. Host device is a connection between second device and your mobile phone it is normal status under high power condumption.
2. When not connected to any device, the earphones will power off automatically after 5 minutes.
3. On iPhones the battery level of the earphones will be displayed in real time.
4. When the earphones and the charger case are not used for long periods of time, it is recommended to keep them a dry place and to recharge them at least every 2 months.
5. It is recommended to gently wipe the spring needle and copper column with a cotton swab on a regular basis to achieve a cleaning effect. Never use liquids to clean the earbuds. Note: When the earbuds is not charging, you can use a cotton swab to gently wipe the spring needle and copper post.

Fault:

Fault| Cause|

Solutions

---|---|---
Can’t power on| Earbuds are low battery/ Crash| Charge the Earbuds/Keep the earphones touch button pressed for 8 seconds
No charging indication| The Earbuds are not well put into/ There are foreign objects in the spring needle and copper column| Adjust Earbuds position/ Clean the spring needle and copper column
Automatically shut down| Earbuds are low battery| charge the Earbuds
he Earbuds have n echo| The volume is too high or the environment is too noisy| Adjust the volume or change position
he Earbuds are noisy| Outside environment interference or too far away from mobile phone| Change position, or move closer to the mobile phone
mall sound| wearing Earbuds incorrectly or the volume is too low| Adjust the Earbuds position or the mobile phone volume
ignal intermittent| Outside environment interference or too far away from mobile phone| Change to better environment or move closer to the mobile phone
arbuds have no sound| Pairing unsuccessful between L and R Earbuds| Put the earphones into the charger case

Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s 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 device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter.

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. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction
  FCC ID: 2AQ27-I21
  Because the earbuds is too small, the FCC ID number can only be printed on the charging box.

Warranty card

Warranty period:
12 months from the date of purchase
Free of charge service:
During the warranty period, if there is any breakdown caused by the products’ build quality please contact the seller and provide this warranty card together with the sales invoice. The Product will be repaired or replaced by a new one.

• he warranty does not apply under the following circumstances:
• The product label is broken. ,Damage caused due to the product being disassembled by a non-authorized repair agent.

1. Damage caused by external force or when there is visible deformation of any of the external parts.
2. The product has been improperly used or stored.
3. Damage or breakdown caused by force majeure.
4. Other situations similar to the above.

Customer service information

Customer Name  :
Customer Phone  :
Customer Address :
Model Number :
Purchase Date :
Dealer :
Invoice number :

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