Best pairs
i12-style in-ear buds · touchscreen case · IPX7

T21 Touchscreen Earbuds

Ebony-black stem earbuds with hybrid noise cancelling, a transparency mode and a touchscreen case that runs volume, tracks, a bud finder and your phone's camera shutter.

  • FitIn-ear, soft ear cushions
  • CaseTouchscreen with 10+ functions
  • NoiseHybrid ANC up to 40dB, transparency
  • Battery8h per charge, 40h with the case
  • WaterIPX7
  • Bluetooth5.3, 55ms latency
Lovely for
  • Gym-goers who want a screen case and an IPX7 rating
  • Commuters switching between ANC and hearing the street
  • Group photos with the case as a camera remote
  • Gamers and video watchers who notice lag
Skip if
  • You want the newest Bluetooth 5.4 radio
  • Battery totals of 50 hours or more
  • An open fit with no tips
Grab this pair

A T21 case screen with ten-plus shortcuts, camera remote included

The T21 puts a touchscreen on the front of its charging case, and the maker packs more than ten functions into it. You can change the volume, switch tracks, ping a lost bud and fire your phone's camera shutter from across the room. The buds are ebony-black in-ear stems on Bluetooth 5.3.

That camera remote is the fun one. Prop the phone on a shelf, step back into the group, tap the case, and the photo takes itself. It works the same for a solo workout video or a family shot at the park.

Everyday jobs the T21's screen takes off your phone:

  • Volume up and down without reaching for a locked phone.
  • Track skips forward and back.
  • Find my buds, for the one that rolled under the car seat.
  • Camera shutter, for photos and selfies from a distance.
  • Battery percentage, shown on the case so you know when to charge.
The screen is a remote, not a replacement. The buds keep their own touch pads, so you can still tap an ear to pause mid-run when the case is in your bag.

The styling is dark and sporty, with a matching case and buds in ebony black. Soft ear cushions come in the box, so you can size the fit to your ears.

Touchscreen cases were once a rare extra; the T21 shows how far they've spread into everyday stem earbuds. For a clear picture of how case controls and bud taps split the work, the touch controls cheat card lays it out tap by tap.

Setup matches any stem pair: open the case, pick T21 in your Bluetooth menu, done. The pairing guide has the steps for iPhone, Android and laptops.

Spec card

Every number on the box

SpecValue
ModelT21
FitIn-ear stem buds, soft ear cushions
Bluetooth5.3, up to 15m
Latency55ms
Noise controlHybrid ANC, up to 40dB
AwarenessTransparency mode
Case screen10+ functions: volume, tracks, find buds, camera remote
Driver14.2mm dynamic
Impedance16 ohm
Sensitivity107dB
Sound modes5 EQ presets
Call micsDual ENC
Playtime per chargeUp to 8 hours
Total with caseUp to 40 hours
Quick charge10 minutes for about 2 hours
Water resistanceIPX7
Weight43g (item weight)
ColorEbony Black
In the boxCase with buds, cable, ear cushions, user manual
Warranty365 days

Hybrid ANC and transparency mode on the T21

Hybrid ANC uses microphones on both the outside and the inside of each bud to measure noise and cancel it. That two-sided approach usually handles a wider range of rumble than single-mic ANC, and the maker rates the T21 at up to 40dB of noise reduction.

Transparency mode does the opposite. It pipes outside sound in through the mics, so you can hear an announcement, a cyclist's bell or a colleague without taking a bud out. Switching between the two is what makes the T21 useful from the front door to the train seat.

ModeBest moment
Hybrid ANCBuses, trains, flights, noisy offices
TransparencyCrossing roads, shopping, quick chats
EQ presetsFive sound styles for music, films and podcasts

A 14.2mm dynamic driver sits in each bud, a large size for stem earbuds, and five EQ presets tilt it toward bass or clearer vocals. The 16-ohm impedance and 107dB sensitivity mean even a quiet phone output gets plenty of volume.

Calls run through dual ENC microphones that filter background noise from your voice. The T21 fits several kinds of day:

  • Video calls and online meetings, where the 55ms latency keeps lips and words together.
  • Mobile games, where low lag keeps sound effects on time.
  • Commutes, with ANC for the ride and transparency for the walk.
  • Work-from-café days, where ENC keeps the espresso machine out of your calls.

Keep in mind that ANC draws extra power, so heavy use trims the battery below the headline figures. On quiet walks, switch noise cancelling off, and the buds will stretch closer to their full 8 hours.

Among the pairs

Where this pair lands

i12 TWS earbuds models by fit and case, September 2026. Highlighted: T21 Touchscreen Earbuds.

Take the T21 to the gym: IPX7 and a ten-minute top-up

The T21 is built for sweat as much as for commutes. Its IPX7 rating covers heavy sweat and rain, and the lightweight ergonomic shape stays comfortable through hours of wear. The ear cushions seal each bud in place so it doesn't bounce loose on a treadmill.

Battery works around a busy day. The buds play up to 8 hours on a charge, and the case extends the total to 40 hours. When you forget to charge, 10 minutes of quick charging gives about 2 hours of play, which covers most workouts.

  1. Charge the case fully before the first session.
  2. Fit the ear cushion size that seals without pressure.
  3. Switch on transparency for road runs, ANC for the gym floor.
  4. Wipe the buds dry before they go back in the case.

Care habits that keep an IPX7 pair going:

  • Let the charging contacts dry before closing the lid after a sweaty session.
  • Rinse sweat off the ear cushions now and then, and let them dry.
  • Keep the touchscreen case out of pockets full of keys.
  • Don't swim with them; IPX7 is a rain and sweat rating, not a pool rating.
A short top-up beats an empty bud. Drop the buds in the case while you change after the gym, and they'll be ready for the ride home.

The case shows the remaining battery as a percentage, so there's no guessing. For case lights, charge times and fixes for a bud that won't fill, see the charging guide. A side that goes silent after a workout is usually fixed with the left and right reset.

Trade-ins

Three other pairs to try

1 CuiSuto M28 Touchscreen
More battery, screen case CuiSuto M28 Touchscreen
The CuiSuto M28 runs 60 hours with its touchscreen case and offers four ANC modes on Bluetooth 5.4.
  • Silicone tips seal out street noise
  • Touchscreen case runs the music
  • Bluetooth 5.4 · 60h with case
Grab this pair
2 Bucephalus T20 Touchscreen
Screen case, Bluetooth 5.4 Bucephalus T20 Touchscreen
The Bucephalus T20 pairs a touchscreen case with ENC call mics and 48 hours of play.
  • Silicone tips seal out street noise
  • Touchscreen case runs the music
  • Bluetooth 5.4 · 48h with case
Grab this pair
3 Fhumsh A10
No screen, same IPX7 Fhumsh A10
The Fhumsh A10 brings 50 hours, an LED case, IPX7 and ENC mics in a sporty in-ear pair.
  • Silicone tips seal out street noise
  • Case shows the battery in digits
  • Bluetooth 5.3 · 50h with case
Grab this pair

T21 Touchscreen versus the CuiSuto M28 and Fhumsh A10

The T21 sits between two kinds of pair: other touchscreen cases with longer battery, and sweat-proof LED-case pairs without a screen. Here's where it lands.

SpecT21 TouchscreenCuiSuto M28Bucephalus T20Fhumsh A10
CaseTouchscreenTouchscreenTouchscreenLED digits
Bluetooth5.35.45.45.3
With case40h60h48h50h
WaterIPX7Sweat-resistantNot listedIPX7
Driver14.2mm13mm13mm13mm

The T21 is your pair if:

  • You want a screen case and an IPX7 rating in one pair.
  • Transparency mode matters for walks and road runs.
  • A camera remote on the case sounds handy.

The CuiSuto M28 is the one for battery: 60 hours and four ANC modes. The Fhumsh A10 skips the screen but brings 50 hours, IPX7 and ENC mics in a sporty shape, and the Bucephalus T20 adds a touchscreen with ENC mics on Bluetooth 5.4.

Tick these off first:

  • Bluetooth 5.3 is fine for your phone; any Bluetooth device connects.
  • 40 hours with the case covers your week between charges.
  • You're comfortable with in-ear cushions rather than an open fit.

The T21 carries a 365-day warranty, so note the date you receive it and keep the box.

Think about your week before you choose. If most of it is gym sessions, rainy walks and a noisy commute, the T21's mix of IPX7, hybrid ANC and transparency covers every stop. If it's mostly long trips far from a plug, the extra 20 hours in the M28's case will matter more than the water rating.

Quick answers

Before these go in your ears

What does the T21 touchscreen case control?

More than ten functions, including volume, track skips, finding a lost bud and your phone's camera shutter. It also shows the battery percentage.

Does the T21 have real noise cancelling?

Yes. It uses hybrid ANC rated at up to 40dB, plus a transparency mode that lets outside sound in when you need to hear it.

Can I use the T21 at the gym or in the rain?

Yes. It's rated IPX7 against sweat and rain. Don't swim with it, and dry the buds before charging.

How long does the T21 battery last?

Up to 8 hours per charge and up to 40 hours with the case. Ten minutes of charging gives about 2 hours of play.