233621 ZEN II, Quick Start Manual

ZEN II

QUICK USE GUIDE

PACKING LIST

PACKING LIST

PRODUCT ILLUSTRATION

SPECIFICATIONS

 Charging Case x1

Earbud x1

Charging Cable 

USB-C To USB-A x1

User Guide x1

Press and hold for 2 seconds

Ambient Mode ON /Noise Cancellation Mode ON

Note: The earbuds are set to Noise Cancellation Mode when powered ON.

Note: due to the differences in mobile phone brand and system, there may 

be subtle differences in operation. Users can contact our after-sales 

service if  have questions

.

Noise Cancellation Mode: 

Our noise canceling technology and 

optimized passive isolation can suppress wide-band ambient noise

Ambient Mode: 

Allows you to hear sounds around you even while 

wearing the earbuds

Choose appropriate earplugs (xs/s/m/l/xl) according to the 
wearing comfort The size M ear tips are attached to the earbuds
in-box.

WEAR DEMONSTRATION

TOUCH FUNCTION

CHARGING CASE LED BEHAVIOR

After putting the earbuds into the ear, rotate and adjust the earplugs 

to the right depth and angle to fit the ear canal (as shown below)

CHARGE

①

When the earbud power is lower than 5%, it will prompt "low power". 

     Put the earbud into the charging box, and the red light of the 
     indicator flashes, that is, it is charging;

②

 When inserting the type-C line for charging, the blue light of the 

     charging box will be on for 5 seconds, and the red light will be on 
     for a long time; 

③

 Fully charged, the blue light of the charging box lights up for 5 seconds;

④

 When charging, the red light of the charging box is on for a long time.

NOISE CANCELLATION MODE AND AMBIENT MODES

USE THE TOUCH PAD 

Use touch pad to control Music Play / Pause, Pick/ Hang up /
Reject call, Noise Cancellation on, Ambient on, and  activate the 
Mobile phone's System voice assistant for conversation.

a. Do not plug the earbuds into your ears without installing ear tips, as 
     this may damage your ears.
b. Earplugs and earbuds should be cleaned irregularly.

a. To avoid hurting your ears, please do not apply excessive pressure on 

     the touch pad with your fingers (touch pad lightly); 

b. To avoid damaging the touch pad, please do not click on it with any
     sharp objects.

① 

Turn on after opening the cover,and take out the earbuds from the 

     charging case,it will automatically turn on.

②

 The LEDs on the earbuds flash red and blue alternately, and the 

     earbuds enter pairing mode.

③

 Find "233621 ZEN II" on the Bluetooth list to pair the first earbud;

④

 Pairing completed, enjoy music

Note: 
a

. 

For the earbuds that are not paired for the first time, when connecting a 

    new mobile phone, you need to press and hold the charging box key for 
    3 seconds to release, and the earbuds, enters the pairing mode , the 
    LEDs flash red and blue alternately. 
b

. 

In the status of wearing connection, briefly press the earbuds touch pad 

    for 5 times, the earbuds, enters the pairing mode, and the LED flashes 
    red and blue alternately.

TURN ON/TURN OFF

The earbuds  in the charging box, open the cover of the charging box 
or the earbuds out of the box, and the earbuds will automatically 
turn on. In the power on state, put the earbuds into the charging 
box or close the cover of the charging box.

PAIRING

Pair and connect for the first time

（

The isolating film on the left and

right earbuds needs to be removed 

）

LED BEHAVIOR 

Earbud LED Behavior

① 

If the earbuds are disconnected with the mobile phone and return 

     to the effective connection range within 10 minutes, Bluetooth will 
     automatically reconnect.

②

 If the earbuds are disconnected with the mobile phone and return

     to the effective range within 10-20 minutes, Bluetooth needs to 
     be reconnected manually.

Bluetooth remote disconnection and reconnect

In the charging box state: open the cover of the charging box or 
operate the earbuds out of the box. earbuds without connection 
records will automatically enter the pairing mode after power on; 
When the earbuds with connection record is powered on and 
connected to the last connected Bluetooth device, the connection 
timeout of 20 seconds will automatically enter the pairing mode; 
The LEDs can be changed into red light and blue light flashing 
alternately.

Turn on to reconnect

When the earbuds are in the charging box and the cover is opened, 
long press the charging box button for 8 seconds to enter the pairing 
mode, and the red and blue lights flash alternately, that is, clear the 
pairing record and restore the factory settings. Previously connected 
mobile phones need to be repaired before they can be used.

Restore Factory Settings

Functions

Operations
Tap once/Put on

Tap once/Put on

Tap once /Remove
Tap 3 times left / right touch pad
Tap twice left / right touch pad

Tap once /Remove

Operations

Music

Play
Pause
Previous song
Next song

Incoming call

Noise cancellation/
Ambient

on

Call/ third party call

voice assistant

During a call

Activate

Tap twice and the second Tap hold for 2s

Press and hold for 2S 

1. Tap twice, pick UP call
2. Tap twice again, Hang Up call
3. Press and hold

，

Reject Call

Tap twice, Hang Up call

There is a new 
call during 
the call

1. Tap twice to keep the current
    call and connect a new call.
2. Press and hold to continue the 
    current call and reject the new call.
3. While holding the call, Tap twice 
    to hang up the current caller.
4. While holding the call,Press and 
    hold to switch between two calls.

Left earbud 

Right earbud

Being Charged

①

 Insert USB, the blue light will be on for 5 seconds, and the red 

     light will be on for a long time; 

②

 When fully charged, the blue light turns on and turns off after 

     5 seconds;

③

 When charging, the red light stays on.

Not being charged (Open / Close the top cover of the charging 
case or press the function button)

①

 The battery power is 70% - 100%, and the red light flashes once; 

②

 The battery power is 30% - 70%, and the red light flashes twice; 

③

 The battery power is 1% - 30%, and the red light flashes 3 times; 

④

 The charging box is low (does not charge the earbuds), and the 

     red light flashes 3 times.

Ear tips x4

Touch pad
Earbud in

box LED indicator

Touch pad
Earbud in

box LED indicator

Charging case

LED indicator

USB-C Connector

Function key

①

 When the earbuds are charged in the charging box,  the 

     red light flashes once every 3 seconds; 

②

 When the earbuds are enter pairing in the charging box, 

     red and blue flashes  alternately;

③

 When the earbuds are fully charged, the red and blue lights 

     are off; 

④

 Restore factory settings, red and blue lights flashes  

     alternately. 

Model:

                                           ZEN II

Bluetooth chip:

                            QCC5141

Bluetooth version:

                      BT 5.2

Speaker size:                               

Φ 10mm 32Ω±15% 100±2 dB@1KHz 

Bluetooth frequency:

                  2400-2483.5MHz

Audio codec support:                 

SBC

，

Aptx Adaptive

Frequency response range:

      20Hz

～

20KHz

Connections: 

                               Type-C

Support mode:

                             HSP1.2/HFP1.7/A2DP1.3/AVRCP1.6

Battery Specification:

                          rechargeable polymer lithium ion 

                                                          battery (single earbud: 3.7V, 85mAh; 
                                                          charging box: 3.7V, 500mAh) 

Play time:   

                                         earbuds are fully charged about 7.5 

                                                           hours (ambient sound on); When the
                                                          charging box is fully charged, the 
                                                          earbuds can be charged twice. 
                                                           Total endurance of 23 hours

Water resistance rating:

            IPX4(for earbuds only)

Weight:

                                          4.2g (single earbud),42g 

                                                          (both earbuds and case)

1. Does the earbud not turn on?

Answer: 

①

 check whether the earbud has no power, and charge the earbud 

      in time.

2. Is the earbud signal unstable?
Answer:

①

 restart the earbud (put it back into the charging box and pick it 

     up again). 

②

 Check the compatibility and call quality of the mobile phone. 

③

 Confirm whether the connected device is too far away from the 

     earbud or there is interference in the surrounding environment. 

④ 

Do not stay in the environment of signal interference reflection.

3. Why is the single / dual earbuds suddenly silent during use?

Answer: 

①

 the Bluetooth switch of the mobile phone is touched by mistake 

     and the Bluetooth of the mobile phone is turned off. 

②

 Due to the particularity of Bluetooth earbuds, your area is in the 

     environment with strong electromagnetic interference, and it will 
     be silent. 

③

 Whether the earbud is set to mute mode.

4. What if there is an electric current sound in the ear? 
Answer: 

①

 if the current sound is obvious, please confirm whether it is 

     caused by environmental interference. It is suggested to use or 
     close the WiFi equipment at another place to reduce interference. 

②

 Please try to put the earbud back into the charging box, close the 

     box cover for 5 seconds, open the box cover and reconnect with 

     the phone to confirm whether the current sound disappears or 

     attenuates. Or after hard reset and restart, connect the mobile 

     phone to confirm whether the current sound disappears or 

     attenuates.

FREQUENTLY ASKED QUESTION