01 / 19Kardian
The Kardian sensor
Kardian

Nothing worn. Measured through the air.

A small radar sensor on the wall above your bed measures heart rate and breathing while you sleep. No camera, no microphone, nothing to charge.

For you Kardian Somily → For a parent XK300 Essence →
Built by a company whose sensors are used in hospitals and senior care.
Two products

One for you. One for someone you love.

Kardian Somily, unboxed
Kardian SomilySee how last night compares with your own usual nights. Plug it in and forget it.
$299 · HSA/FSA eligible†→
 A daughter's hand resting on her mother's
XK300 EssencePrivacy and dignity for a parent you love. Nothing to wear, no camera, no microphone. A clinician sees the measurements.
FDA 510(k) · Class II · Rx→

† HSA/FSA eligibility applies to qualified customers. Kardian Somily is a general wellness product, not a medical device. The XK300 Essence is an FDA 510(k)-cleared (K202464) Class II medical device, prescribed for qualified remote patient monitoring recipients.

How it works XK300 Essence: FDA-cleared for heart rate and breathing · Kardian Somily: a separate wellness product, not cleared

A pulse goes out. The body comes back.

How the sensor reads you: the chest rising with each breath, moving with each heartbeat.

  1. Impulse radarA tiny pulse, fifteen million times a second, at more than a hundred times less power than your Wi-Fi router.
  2. Through the duvet7.3 gigahertz sits in the same range as Wi-Fi. The way Wi-Fi reaches through walls, this reaches through bedding and clothing.
  3. Only when you are stillYour chest rising with each breath. Your chest moving with each heartbeat.
  4. A reading every few secondsThousands a night. Not one average in the morning.
Heart rateBreathingMovementIn bed, out of bedSleep

One radar, two products. On the XK300 Essence, heart rate and breathing rate are FDA-cleared measurements, prescribed through a care provider. Kardian Somily is a separate general wellness product built on the same underlying radar technology: it is not the cleared device, and its readings are for your own information, not FDA-cleared. Neither product diagnoses, and neither is an alarm.

Your baseline Trend, compared with your own nights · not a diagnosis

Normal for everyone is not normal for you.

It learns your own resting heart rate and breathing, night after night. Then it compares each night with yours, not with a chart.

Illustrative. Sixty nights of one person. The shaded band is their own usual. The last ten nights sit outside it.

What it reads while you sleep

Sleep. Heartbeat. Breathing.

Waking up and checking last night on a phone
KardianNo ring, no band. Every night.
01 · Sleep

Track your sleep, without any wearables.

48%of US adults have used a sleep tracker.

AASM survey, 2025

More
Already wear a ring or band?Keep it. Kardian adds breathing measured at the chest, resting heart rate and when you got up. No clash.
Don't want to wear one?Nothing to put on or charge. Plugged in once on the wall, it reads every night you are in bed.
Strong and even
Weak and uneven
02 · Heartbeat Clarity

Not how fast. How clearly.

How clean and even each heartbeat looks to the radar, against your own nights.

Wellness trend in Somily · investigational
More
Not a number a wrist can giveA finger or wrist sensor reads the pulse. Heartbeat Clarity comes from the chest itself.
Your own baselineEach night sits beside your recent nights, so you see your own pattern, not an average of strangers.
Watch it explainedThe 2:43 film →
A couple asleep at night under a duvet
KardianEvery breath counted, no wearable needed
03 · Breathing

Breathing, counted, not guessed.

±1.18breaths a minute from the lab reference.

Lab reference: end-tidal CO₂, in testing of the XK300 radar Kardian is built on.

More
Lab referenceKardian
Most trackers estimateRings and watches work breathing out from your pulse. Kardian counts each breath at the chest.
Rhythm, not just rateThe spacing between breaths, kept breath to breath. In Somily, breathing rate and rhythm are wellness trends.
The film · 2:43

Same number. Different measurement.

It is not what the number is. It is how it was measured.

A smart ring and a fitness band, wornA ring or a bandEstimatesfrom the pulse at your finger or wrist.
The Kardian sensor on the wallKardian SomilyMeasureseach heartbeat and breath at the chest. Nothing worn.

In Somily, breathing rhythm is a wellness trend and Heartbeat Clarity is investigational. Neither is an FDA-cleared measurement. More on the science page.

How it compares

Already wear a ring or a watch? Compare.

Ringvs KardianRing Wrist-worn wearablevs KardianWrist-worn wearable Under-mattress padvs KardianUnder-mattress pad Other radarvs KardianOther radar

See every comparison →

The care-setting record XK300 · FDA-cleared since 2021

In care settings, the readings had often shifted days before a diagnosis was recorded.

4–6days

The average interval, looking back at records from care settings where the clinical XK300 was in use. Retrospective research, not a claim that any Kardian product detects or predicts anything.

See the full record →
2021FDA clearedXK300, 510(k) K202464
49,000+People measuredIn care settings across seven countries
2024Independently certifiedOutcomes reviewed by the Validation Institute
6,000+Readings a dayPer person, every few seconds
TIME Best Inventions 2024 CES Innovation Awards 2025 iF Design Award Red Dot winner 2024 Fast 50 Validation Institute World Economic Forum UpLink
The sensor on the wall above a bed

On the wall above your bed. Plug it in and forget it.

Nothing worn. Nothing to charge. No camera, no microphone.

Kardian Somily →XK300 Essence →
So, how do I install it?

On the wall in three minutes. Then never again.

  1. Pick the spotAbove the headboard on your side, near the bed corner, or behind the bed frame. The three placements.
  2. Press it onTwo strips of the tape in the box, or one screw. Face toward the bed.
  3. Plug it inOne thin cable to the USB adapter. It runs on wall power, so there is nothing to charge.
  4. Open XKareFor Somily: pair once, and it starts reading that night. For the XK300 Essence there is no app; your care team completes the connection and reviews the readings.
Questions

The ones we get asked.

Which one is for me?

If a clinician or a remote-monitoring provider looks after you, they supply the XK300 Essence on prescription. For your own wellness at home, Kardian Somily.

I already wear a smart ring. Do I take it off?

No. Keep it. A ring is good at daytime activity, HRV, skin temperature and sleep stages; we do not do those. We measure breathing and resting heart rate from the chest, through bedding, with nothing worn, and compare each night with your own. Read both in the morning. The side-by-side.

We are two in the bed. How does it know who it is reading?

It collects from the closest body. Mount it above your side of the bed, left or right, and it reads you. Two people, one sensor each, above each side, each paired to its own person in the app. Hugging or drifting over for a while is fine: if it picks up two sets of vital signs it pauses, and with thousands of readings a night, a couple of hours on the wrong side barely moves your baseline. See the two-sensor bedroom.

Is there a camera or a microphone?

No. There is no lens and no microphone in the disc. Radar reads movement. It cannot see a face or hear a word.

Does it work through blankets?

Yes. The wavelength passes through a duvet, a topper and clothing, in any sleeping position.

Where does it go?

Above the headboard at about 1.5 metres, near the bed corner just above the mattress, or behind the bed frame. Two strips of tape, one cable to a USB plug.

Does it need charging?

No. It runs on USB power from the wall, so it is always on and never flat.

Is it safe?

Yes. The radar runs at more than a hundred times less power than the Wi-Fi router already in your home, and this radar technology has been used in hospitals and nursing homes since 2021.

Can I pay with my HSA or FSA?

Yes, for qualified customers in the United States. Paying with an HSA or FSA card includes a short health survey; if a licensed clinician approves, they issue a Letter of Medical Necessity. Keep your receipt and the letter; your plan administrator has the final say.

Is Somily a medical device?

No. Somily is a wellness product for your own bedroom. The XK300 Essence is a separate, FDA-cleared prescription device, set up through a remote-monitoring or care provider.

Contact

Ask XK-AI. Or talk to us.

Ask XK-AI

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Are you a clinician or a care provider?

Programmes, evidence and pricing for organisations live on our clinical site.

kardianhealth.com