Charging on the go
Independent use one earbud while charge the other one. In this way, it can reach an up to 6 hours no-stop calling time a day.
Immersive listening experience
Bluetooth®5 + Stereo Audio DAC+Smart Dynamic Gain
Up to 40ft(12M) steady wireless range
Lots of options for example from answering calls to waking up Siri or Google can be done easily by tapping the earbuds.
Dancing in the rain
plasma sprayed nanostructured ceramic coating-IPX5 Water-resistance
Ergonomic fit for everyone
We tested thousands of ears! No matter how hard you shake, it just won't fall out.
The sound you can see.
The sound audio engineers of UiiSii never hide that they are talented. The beautiful timbre comes from 13mm Speaker in UiiSii SongBirds Semi In-Ear makes you almost forget that you are experiencing a pair of budget wireless earbuds.
- 3D surround sound
- Build-in DAC for beautiful timbre
- Micro AMP module for HD Audios
- Acoustic Wave Guide Damper
Tap them up.
- Answer or reject calls
- Hang up
- Select previous or next Track
- Volume up or down
- Wake up smart assistants Siri or Google
Follow the rhythm,let’s shake!
Stable & Comfortable Fit
- Lighter then a cent.
- Classic bird's beak shape, Half In-Ear Wireless Headphones.
Using While Charging
- Up to 6 hrs for calling under Mono mode
- A must-have for calling while driving
Charging on the go.
8 Minutes Fast Charging
- Long-lasting case support 4 times of charge.
- Around 1 hrs of listening time on only 8 minutes of charging.
UiiSii TWS21 SongBirds
The Best budegt bluetooth 5.0 earbuds for amazing sound
3D ambient surround sound
The home theater sits in your ears
Say”Hi” to your Siri, Say”OK”to your Google.
Wake up smart assistants by tapping
A2DP, AVRCP, HSP, HFP
32 Ohm ± 15% at 1KHz
109 ± 3dB at 1KHz
20Hz - 20kHz
Bluetooth SBC Implementation
3.5 Hrs* + 12 Hrs in the case (Stereo Mode)
8 min = half an hour playtime
5*4*2 cm /1.96*1.57*0.78 in
33g/1.16oz (including charging case)
3g / 0.11oz each earbud on average
*May vary dependent on usage, device & aging.
Yes, double click button right for volume up, left for volume down.
Yes, each earbud could be used independently.
It has warm deep bass
TWS21 wireless earbuds give you more than 3 hours of audio on a single charge, plus around 12 hours more in the charging case, with an 8-minute quick charge offering a 50 minutes of playtime. Independent bud use extends the total time of application to 24 hours.
When not using the buds, just put them back into the case, and close the case. It will be disconnected from your cell phone.
If the earbuds become unable to reconnect, you can reset and reconnect to resolve.
Step 1: Unpair TWS21 from your Bluetooth-enabled device and delete the old connection on your device.
Step 2: Pick up the earbuds from the case and press the buttons for 3s at least to power off as they flash in red.
Step 3: Press and hold the button on each earbud simultaneously for at least 5s until they flash in blue.
Step 4: Put it back into the charging case and search the Bluetooth signal on your phone once again to start to connect.
30-Day Money-Back Guarantee and a one-year warranty for impersonal factors of malfunctions after purchase.
It’s good but I have a problem with this. I can’t connect both earphone. If left ear side is connecting right side is not. How can I fix it?
I bought this mainly for phone calls and listening to u toob and watsap media while out and about. Also I prefer this model because I do not like buds sticking into my ear canal while working.
For the mini$, and to compare apple with apple it surpasses apple's sound quality. Of course there are pears and oranges out there but this TWS21 knocks them out of two football fields into the jungle. The model should be TWS21-L(eg to kick).
Soundstage is large complementing its size and price. Sound timbre is great. Piano, the most difficult to reproduce, sounds like a piano. Does not sound tinee like the price. EQ could do will a little reduction in mid, increase both in low (for kick and bass presence) and highs for cymbal clearness and clarity.
Just to proof a point, I downloaded an EQ app for some fine adjustment. I do not like EQ apps because it reduces the dynamics of the original signal. With EQ, this little TWS21 ZOUNDS Great. Just for a test, 60hz was up +3db and the kick came alive. 250@+2db, Bass guitar was present. 10k@+2db cymbals were shiny and crystal shimmering. This is just to proof that this buds could be EQ'ed. However I do not intend to use the EQ app due to it reducing the source dynamics. I can live with the factory eq for now.
I reckon Uiisii could develop a flat sound with a user adjustable EQ model.
Due to small size, operating as Stereo, only way to listen to music, will run it down very quickly. Looking at the battery indicator on the phone, seems like slightly less than 1% / min consumption.
I don't use this for exercise, so cannot comment on it but normal walking, socialising head movement and eating would not dislodge the buds.
The case is super smooth. I have drop it a few time while picking it up. Trying one-handed opening without paying attention while shoot the case into the air. Could do with rubber grip.
The negatives outgun the positives for TWS21 for its price.
Accurate description. They fit perfectly in ears sound is excellent. Would purchase again highly recommend.
These are amazing!
I have not had one problem with them. they aren't loose fitting in your ear and fall out like other ones I have had. The price is far less than its value.