UiiSii TWS21 TWS Earphones User Manual
- June 5, 2024
- UiiSii
Table of Contents
UiiSii TWS21 TWS Earphones
Thank you for choosing the TWS21 True Wireless Stereo Earphone developed by Uiisi! To better use this product, please read the Quick Start Guide carefully before using and properly managing it.
Product Specifications
How to connect
Earphone power-on/power-off
Power-on
- The charging case is opened and the earphone is automatically turned on.
- In the power-off state, hold down the MFB button for three seconds to power on the headset. The red and white indicators will light for 1s. There is a beep sOund once it Is powered on.
Power-off
- Put the earphone in the charging case cover and the earphone is automatically turned off.
- In a power-on state, hold down the MFB button for 5s. The red and white indicators
will light for 1s. There is a beep sound once it is powered on.
Pairing (first use)
- Open the charging case cover, and the left and right earphones alternately flash red and white indicators, then pair the left and right ears and wait for about 10S. After the pairing is successful, the left and right ears are slowly flashing red and white indicators to match the phone.
- Enable the Bluetooth function on the phone. Search for the Bluetooth device Uiisii TWS21. Select Connect. After the connection is successful, a “Connected” message is displayed.
How to charge
Charging the charging case
Please use a 5V-2.1A low-power charger for charging. During charging, the
charging LED flashes white. When power is on, the white light is always on.
(It takes about 2 hours to fully charge the charging stand).
Charging the earphone
Please put the left/right earphones into the charging case correctly, and then
close the charging case. The indicator of the charging case is on. At this
time, the red indicator on the left/right earphones will light up for
charging. When the earphones are fully charged, the red indicator light will
go out. It takes about 1.5 hours to fully charge the earphones. A fully-
charged charging case for the earphones charge more than 3 cycles.
Low battery level indication
When the earphone has a low battery, the Bluetooth status indicator will turn
to a red indicator and flash slowly, and you can hear the low battery show
sound.
How tO use
- Headset power-on: The charging case is opened and the earphone is automatically turned on.(Or hold down the MFB for 3s in power-off state.)
- Headset power-off: Put the earphone in the charging case cover and the earp- hone is automatically turned off. (Or hold down the MFB for 5s in power-on state.)
- Play/Pause: Click on the left or right earbud.
- Previous/Next: Long press on the left for 2 seconds/ Long press on the right for 2 seconds
- Volume +/ volume -: Double click on the left / Double click on the right
- Siri function: Three-click the left or right ear to wake up the Siri function in the connected state.
- Answer/Hang up a call: Short press the left or right button
- Reject a call: Long press the 1S left or right button.
- Clear pairing information: Long press the MFB for 8s in power-off mode to clear pairing information.
- Secure pairing: If the Bluetooth device connected to the headset runs a version lower than 3.0, a password is required. Enter the default security code 0000 to pair the headset with your phone.
- Automatic power-off: If the earphone is not connected to a phone, it will be automatically powered off in 3 minutes so as to save power
- Reset: Put the headset into the charging case.
Important safety information
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Caution: If you do not intend to use the headset for a long time, charge the headset once every 20 to 30 days to ensure its expected service life.
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Don’t remove or replace the Battery. including sensitive electronic components, including a battery. and can be damaged or cause injury if dropped, burned, punctured, crushed, disassembled, or exposed to excessive heat or liquid. Don’t use damaged batteries and electronic components.
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Disposal and recycling information Don’t treat the product and battery as household waste or into a fire. When you decide to dispose of the product and its battery. please follow the local environmental laws to handle the battery to avoid an explosion.
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Medical device interference
The product contains components and radios that emit electromagnetic fields and also contains magnets. These electromagnetic fields and magnets may interfere with pacemakers, defibrillators, or other medical devices. Maintain a safe distance of separation between your medical device and product. Consult your physician and medical device manufacturer for information specific to your medical device. Stop using the product if you suspect it is interfering with your pacemaker, deñbrillator, or any other medical device. -
Please fully charge before use. Please use a low-power charger below 5V-2.1A to charge, otherwise, it will cause damage to the earphone.
EU Declaration of Conformity
Hereby, Dongguan Uiisii Electronics Co., Ltd declares that the radio equipment
of type Bluetooth Uiisii TW$21 is in compliance with Directive 2014/53/EU. The
full text of the EU declaration of conformity is available at the following
internet address: http://www.uiisi.com/doc/.
Caution:
- Use the Bluetooth Earphone in an environment with a temperature between -10’C and 40C.
- The product shall only be connected to a USB interface of version USB2.0 or higher and the connection to a power USB is prohibited.
- For Battery: Risk of explosion battery is replaced by an incorrect type, dispose of used batteries according to the instructions.
- To prevent possible hearing damage, do not listen at high volume levels for long periods.
FCC STATEMENT NOTICE
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 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:
- this device may not cause harmful interference, and
- this device must accept any interference received, including interference that may cause undesired operation.