- Silicone tips seal out street noise
- Touchscreen case runs the music
- Bluetooth 5.4 · 60h with case
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.
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:
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 | Value |
|---|---|
| Model | T21 |
| Fit | In-ear stem buds, soft ear cushions |
| Bluetooth | 5.3, up to 15m |
| Latency | 55ms |
| Noise control | Hybrid ANC, up to 40dB |
| Awareness | Transparency mode |
| Case screen | 10+ functions: volume, tracks, find buds, camera remote |
| Driver | 14.2mm dynamic |
| Impedance | 16 ohm |
| Sensitivity | 107dB |
| Sound modes | 5 EQ presets |
| Call mics | Dual ENC |
| Playtime per charge | Up to 8 hours |
| Total with case | Up to 40 hours |
| Quick charge | 10 minutes for about 2 hours |
| Water resistance | IPX7 |
| Weight | 43g (item weight) |
| Color | Ebony Black |
| In the box | Case with buds, cable, ear cushions, user manual |
| Warranty | 365 days |
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.
| Mode | Best moment |
|---|---|
| Hybrid ANC | Buses, trains, flights, noisy offices |
| Transparency | Crossing roads, shopping, quick chats |
| EQ presets | Five 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:
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.
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.
Care habits that keep an IPX7 pair going:
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.
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.
| Spec | T21 Touchscreen | CuiSuto M28 | Bucephalus T20 | Fhumsh A10 |
|---|---|---|---|---|
| Case | Touchscreen | Touchscreen | Touchscreen | LED digits |
| Bluetooth | 5.3 | 5.4 | 5.4 | 5.3 |
| With case | 40h | 60h | 48h | 50h |
| Water | IPX7 | Sweat-resistant | Not listed | IPX7 |
| Driver | 14.2mm | 13mm | 13mm | 13mm |
The T21 is your pair if:
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:
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.
More than ten functions, including volume, track skips, finding a lost bud and your phone's camera shutter. It also shows the battery percentage.
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.
Yes. It's rated IPX7 against sweat and rain. Don't swim with it, and dry the buds before charging.
Up to 8 hours per charge and up to 40 hours with the case. Ten minutes of charging gives about 2 hours of play.