Shenzhen Xiwxi Technology S21 TWS Bluetooth Headset User Manual

Shenzhen Xiwxi Technology S21 TWS Bluetooth Headset User Manual

Thanks for using our wireless electronic products. For a good user experience, please read the manual carefully before using the products.
Notice: To avoid unnecessary troubles please do not disassemble these products by yourself and use the standard charger to charge.

Product Overview

Ear caps

We provide three sizes of ear caps (large, medium and small). Please use the proper size of ear caps to fit your ears to get a better wearing experience.

Earphone operation

Pairing Manual

1. Take out the two earbuds from the charging case and peel off the insulating film.
2. Put the earbuds into the charging case to charge (the earbuds are in charging state).
3. Take out the two earbuds, they will turn on and pair automatically and will be prepared for pairing to the phone (the indicator will turn to red and blue alternately).
4. After successful paired the, indicator of the slave earbud will go off and the indicator of master earbud will turn to red and blue alternately.
5. Turn on the Bluetooth function on your phone and search【S21】and connect it.

Tips: If the earphones can’t be found and not in the pairing mode, you can double click any earbud to enter the pairing mode.

please restore factory setting!

1. Please turn off the Bluetooth of the mobile phone and the earbud light will flash red / blue. Quickly press the power button of the earbud four times.
2. Please delete all paired records on the phone and re-search【S21】after clear the pairing .

Siri and other Voice Assistant

IOS and part of the Android users can triple touch the left or right haptic button to turn on the voice assistant.

Turn ON
Take out the earbuds from the charging case or touch the haptic button for 3 seconds until the indicators flash blue once.

Turn OFF
Put the earbuds into the charging case, they would turn off and start charging, or disconnect the Bluetooth, it will turn off in about 5 minutes.

Charge

Note: Please put both earbuds in the charging case to fully charge them on first use.

Charging earbuds

Rad indicators flash when battery low, please charge in time.

1. Put both earbuds into the charging case, they will charge automatically.
2. Charging will stop when earbuds are fully charged.

Charging Case

Blue indicator flashes when charging case with low battery, please charge in time. Plug the TYPE-C cable into the charging interface and the charging case will charge automatically. (When charge current over 5V 1A, the charging case will limit the current automatically)

LED indicator

Charging case indicator

Status/Indicator
Charging to case: Red light on
Full Battery: Green light on
Charging for earbuds: Red light on
Low Battery: Red light flashes

Earbuds indicator

Status/Light
Turn on: The blue light flashes for 1 second Then the red blue light flashes twice
Turn off: The red light goes out after flashing for one second
Search earbuds: Red and blue light flash alternately
The earbuds connect successfully: After successful pairing, the light of the main ear flashes alternately in red and blue
Connect with mobile phone successfully: The blue light of both earbuds flash once circularly for 6 seconds
Music play: No light
Low battery: Earbud red light flashes once every 6 seconds
Charging: Red light on
Full battery: Red light off

Button Control

Turn on: Hold left/right earbud MTB for 3 seconds
Turn off: Tickle the MFB button for 5 seconds (when it is disconnected.)
Previous song: Tap left earbud power button twice
Next song: Tap right earbud power button twice
Volume+: Hold right earbud power button
Volume-: Hold left earbud power button
Play/pause: Tap left/ right earbud power button once
Pick up phone: Tap left/ right earbud power button once
Hang up phone reject calling: Hold left/right earbud power button for 2 seconds
Voice assistant activation: Tap left/ right earbud power button 3 times

Warm notice

For any single earphone, when it is in standalone mode, you can’t use it to play the previous song or decrease the volume.

Parameter specification

Waterproof

PX8 Waterproof Nano-coating efficiently protects the earbuds from the damage of the splash by sweat and raindrops
No need to worry when you wear it while running, skiing, etc. (not for swimming)

Signal transmission distance shown as below:

Attentions

Please make sure that the headset and USB-C charging port are dry, if there is water, please wipe it with a dry cloth and then put it back Charging case to avoid damage the device.

1. Do not use corrosive liquid to clean this product.
2. If it comes into contact with chemicals, please rub it with a damp cloth wet with clean water.
3. Do not use this product under extreme circumstances for temperature below -10 degree Celsius or above
4. Do not expose the charging case to dripping or splashing water 60 degree Celsius .
5. To avoid explosion, please do not throw this product into fire.
6. To avoid scratches, please do not touch the earbuds with sharp objects.
7. Do not insert objects into the earbuds, otherwise it would cause damage to the internal components.
8. Do not disassemble the earbud.
9. Please keep regular charge to earbuds, don’t leave them become empty battery status to keep their lifetime.
10. Please do not charge products with power adapter over 2A current. Excessive current may cause the damage to battery.

Battery Warning

 There is a built-in lithium battery in this product. To avoid explosion, do NOT expose the product to strong sunlight, fire or throw it into fire.

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