Does the 4-7-8 pacer make any sound or need my phone?

No. The entire cue is a dim teal wave on the 8×32 RGB LED matrix—no audio track, no app running, no screen glow; pair the sleeve once, send this profile from the Sleeve Studio app, and it paces on its own.

Can I use it discreetly in a meeting or while a partner sleeps?

Yes. At 25% Breath-Soft brightness the matte-black sleeve shows a barely-lit teal column that only you can see when your forearm is in view, and it emits no light pollution into the room.

Can I switch to box breathing or a longer exhale pattern?

Yes. Tap Pad 2 to cycle presets (4-7-8, Box 4-4-4-4, and 6-2-8), or edit the inhale, hold, and exhale durations in plain English in the Sleeve Studio app and send the new mode over Bluetooth.

Use Case #44 · Accessibility, Health, Parenting & Everyday Friction · All 50 Modes

Guided 4-7-8 Box-Breathing Light Wave on a Forearm LED Sleeve

Pace 4-7-8 breathing to a calm teal light, not a phone: the 8×32 LED matrix expands for 4 seconds, holds 7, contracts 8 — silent and screen-free for $199.

Breathe on a light cue: A dim teal wave swells, holds, and releases across your forearm so you follow the rhythm without unlocking a screen.
Skip the audio and the glow: Tap Pad 2 for box or 6-2-8 patterns, or drop to a barely-lit 25% — all on 5 soft fabric pads.
Ready out of the box: Ships as one of the 50 built-in modes; change timing, color, or pad actions in the Sleeve Studio app.

Preorder Sleeve · $199 Free US Shipping Try in Sleeve Studio →

▶ See the 8×32 Forearm Display in Action

Watch the 8×32 RGB LED matrix and 5 conductive-fabric touch pads running timers, kitchen, focus, health and work modes on the forearm sleeve. Concept render · simulated 8×32 display · first production run of 500 units.

Why Audio Breathing Apps and Phone Timers Break Calm

Unlocking a phone defeats the point: A spinning ring or voice track in a meeting or beside a sleeping partner adds the stimulation you were removing.
One peripheral cue: A single teal wave gives you a silent, screen-free pacing rhythm you can follow at a glance, hands free.
Peer-reviewed textile roots, shipping hardware: The Oct 2026 NUS Nature paper coined “garment GUI” with a lab-only woven pixel fibre (not for sale); our shipping $199 sleeve uses 5 sewn conductive-fabric pads and a removable 8×32 LED pod.

What Each Forearm Pad Does (Pads 1–5)

Pad 1 (Elbow)Single tap — Start / pause a 4-7-8 paced session · LED cue: Full-width teal wave swells in: INHALE · 4

Pad 2 (Upper Mid)Single tap — Switch preset (4-7-8 / Box 4-4-4-4 / 6-2-8) · LED cue: Scrolls the pattern name, then resumes pacing

Pad 3 (Center)Double tap — Begin session and set the 8-minute default timer · LED cue: Teal wave pulses; corner timer reads 08:00

Pad 4 (Lower Mid)Press & hold — Toggle brightness (Breath-Soft 25% / Standard 60%) · LED cue: Matrix dims or brightens to match the setting

Pad 5 (Wrist)Swipe — End session with a closing exhale flash · LED cue: Single full-bar exhale ripple -> SESSION DONE

Customize in 30 seconds: Pick this mode in the Sleeve Studio app, type or speak new words or pad actions, and tap Send over Bluetooth — no code.

Frequently Asked Questions

Does the 4-7-8 pacer make any sound or need my phone?: No. The entire cue is a dim teal wave on the 8×32 RGB LED matrix—no audio track, no app running, no screen glow; pair the sleeve once, send this profile from the Sleeve Studio app, and it paces on its own.
Can I use it discreetly in a meeting or while a partner sleeps?: Yes. At 25% Breath-Soft brightness the matte-black sleeve shows a barely-lit teal column that only you can see when your forearm is in view, and it emits no light pollution into the room.
Can I switch to box breathing or a longer exhale pattern?: Yes. Tap Pad 2 to cycle presets (4-7-8, Box 4-4-4-4, and 6-2-8), or edit the inhale, hold, and exhale durations in plain English in the Sleeve Studio app and send the new mode over Bluetooth.

Run This Mode on Your Forearm — Reserve Batch 01 ($199)

Complete hardware + 50 modes ($199): 8×32 RGB LED matrix (256 pixels), 5 sewn conductive-fabric touch pads, and a 5-second slide-out washable electronics pod.
Sleeve Studio app ships first: Personalize all 50 modes in plain words before your sleeve arrives (small monthly subscription; zero code).
Zero-risk preorder: First run of 500 units (~30 days to production), free US shipping, 100% refund anytime before shipping + 90-day money-back guarantee.

Preorder Sleeve · $199 Free US Shipping Open Sleeve Studio Full Hardware Specs

Watch → Prove → Buy

Not ready to order yet? Take the next step.

See the hardware in motion, read the peer-reviewed textile research behind it, or reserve your spot in the first production run of 500 sleeves.

STEP 1Watch the sleeve in action Five soft touch pads, an 8×32 RGB LED display, Bluetooth, and a removable electronics pod for gentle washing. See the hardware → STEP 2See how the app customizes any mode Pick from 50 pre-built modes or type a new one in plain words. The Sleeve Studio app ships before your hardware. See Sleeve Studio → STEP 3Preorder the Sleeve — $199 First run of 500. ~30 days to production. Free US shipping. Full refund anytime before it ships. Order now →

90-day money-back guarantee, plus a full refund any time before the sleeve ships.

Questions about your setup? Call +1 725-338-4835 or email alex@midnightdev.dev.