Replacement Ear Tips

Product highlights

Clinical-Grade EEG Monitoring

Clinical-grade data from your brain, not your wrist.

Smartbuds use 6 clinical-grade EEG sensors to monitor your brain’s activity in real time.
When Smartbuds detects certain shifts in brain activity, adaptive sounds are played to nudge you back to the ideal state.

Slow Wave Boost

Get the most out of your deep sleep.

While in N3 deep sleep, your brain is consolidating memories to long term storage, your body is recovering, and your brain is detoxifying. Smartbuds detect when you’re in N3 deep sleep and provide audio stimulation to boost the effects of N3 deep sleep.

Coming Soon

Brain Responsive Audio Tracks

Tracks designed to keep you in the zone.

When in a Relax or Focus session, listen to the audio shift in real-time in response to your brainwaves and movement. Falling out of focus? Smartbuds gently nudge you closer to that flow state and remind you when you’re getting off track.

Helpful Summaries and Insights

Go beyond tracking with actionable insights.

Smartbuds capture sleep, relax, and focus data in exceptional detail, enabling deeper, actionable insights. Don’t just see how well you’re sleeping, but see and feel how Smartbuds is actively improving your sleep.

Fresh Fit Every Month

Get new tips and wings sent to your door every month

Smartbuds use Tecticoat®, an industry-leading dry electrode material. Every month, get a new set of comfortable tips and wings sent to your door to keep signal strong and clean.

Brain Responsive Sleep Technology

Smart sensing, all night

Your Smartbuds combine brain sensing with science-backed sounds to help you rest better. Let’s dive into how it works.

Your body has a rhythm, Smartbuds tune in

Your brain generates bursts of electrical activity—called brain waves—that change shape as you progress deeper into sleep.

Detecting your sleep

As you fall asleep, Smartbuds track these shifts with in-ear EEG sensors.

Your most restorative sleep is powered by slow waves

These deep, low-frequency waves appear when your brain enters recovery mode, supporting memory, cellular repair, and other critical processes.

Sound waves that boost your slow waves

Smartbuds play gentle pink noise pulses that sync with your brain’s natural rhythms, deepening slow waves for better sleep quality.

Relax Coming Soon

Turn your break into a breakthrough

While meditation apps play the same track regardless of your state, Relax Mode with Smartbuds respond to your brain waves and body movement in real-time to actively improve your midday resets.

Focus Coming Soon

Productivity, optimized for you.

Focus Mode with Smartbuds responds to your brain in real time to keep you in the zone.

As your brainwaves shift, individual instruments in the soundscape subtly adjust to bring you back to focus, while visual cues keep you aware of your state. After each session, you’ll see detailed summaries highlighting when you were most productive.

The Power of Slow Wave Enhancement

Using sound for more restorative sleep

During deep sleep, the brain generates slow waves—rhythmic pulses that signal your brain and body are recovering. Smartbuds enhance these waves with sound to improve sleep quality. Here’s how.

Realtime brainwave detection

Throughout the night, Smartbuds monitor your brainwaves in real-time. As your brainwaves shift, Smartbuds detect these shifts and recognize when you enter slow wave sleep.

Boost slow waves with sound

When in slow wave sleep, Smartbuds play audio in sync with your brain rhythms to increase slow wave activity.

Wake up with energy and clarity

Experience what efficient sleep feels like. Sharp focus, sustained energy, and the satisfaction of knowing you’ve maximized every minute of rest.

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Trusted by

See How We Compare

	NextSense Smartbuds	Ozlo Sleepbuds	Soundcore A20	Oura Ring
Tracking Type	EEG (Most Accurate)	None	None	ECT + Movement
EEG
Deep Sleep Enhancement
Clinical Validation
Pause Audio When Sleeping				N/A
Low-Energy Bluetooth
Custom Audio Playback				N/A

Ready to Sleep Smarter?

Add to Cart

Step 1

Purchase Smartbuds & Choose a Subscription.

Save by subscribing for multiple months.

Your subscription ensures Smartbuds continue to perform at their best and includes regular tip and wing replacements, which are essential for maintaining comfort and a strong EEG signal.

Step 2

Receive your Smartbuds in the mail and start using them.

The NextSense App will let you know when it’s time to replace your tips and wings  (average 30 days)

Step 3

Periodically receive new wings and tips in the mail to keep your signal strong.

Technical Specifications

Sensors & Measurement

Electroencephalography (EEG):
2, 24-bit channels sampled at 1000 Hz

Soft Flexible Sensors:
6 clinical-grade dry-contact surface electrodes with Tecticoat

Sensing Locations:
Ear Canal, Concha Cavum, and Antitragus

Body Motion:
6-axis inertial movement measurement from accelerometer & gyroscope

Audio & Stimulation

Slow Wave Stimulation:
EEG-guided auditory stimulation

Audio Playback:
48kHz / 16-bit

Audio Driver:
6 mm Dynamic Driver, frequency range: 20 Hz – 20 kHz

Battery & Charging

Battery Life (Smartbuds):
Up to 9 hours of streaming and stimulation / on-devide audio

Battery Life (Charging Case):
Up to 4 additional charges

Charging Port:
USB-C

Battery Capacity:
Each earbud: 35 mAh / 0.13 Wh Charging case: 400 mAh / 1.48 Wh

Connectivity & App

Bluetooth Version:
Bluetooth 5.3
BR/EDR, LE, Dual-mode, LE Audio

Companion App:
iOS17 or Late

Data Syncing:
Continuous, event-driven sync

Comfort & Fit

Ear Tip & Wing Sizes:
3 sizes (S,M,L)

Ear Tip & Wing Material:
Conductive silicone with Tecticoat(tm) coating

Weight per Smartbud:
~5g

Cable Length:
400mm / 15.7in

In the box

Smartbuds + case
Getting started material
XXcm USB-C to USB-C cable
Eartips (S, M, and L)
Wings (S, M, and L)

Answers to important questions

Submit a question or concern through this form
Contact our customer support line: 888-898-8068.

EEG & Brain data

EEG (electroencephalography) measures electrical activity in the brain. It's the gold standard for sleep science, allowing Smartbuds to detect sleep stages and optimize audio in real time—unlike wrist trackers that only infer sleep from movement or heart rate.

No. EEG detects patterns like sleep depth or transitions—not thoughts, memories, or emotions. Your mental privacy is deeply respected.

Yes. We never sell or share your data. Data sharing is off by default, and all information is encrypted, stored securely, and anonymized before leaving your device. You can delete your data anytime from within the app.

Slow-wave sleep, also called deep sleep, is the most restorative stage of sleep. It's when your brain produces slow, high-amplitude delta waves. This stage is essential for waking up refreshed.

Sounds

It can—if it's the wrong kind. Jarring, unpredictable, or overly stimulating audio can disrupt your rest. That's why Smartbuds use gentle soundscapes specifically designed to support healthy sleep. When personalized and timed right, sound can actually enhance your sleep rather than interrupt it.

Slow-wave enhancement is a technique that uses precisely timed sound (soft pink noise) to nudge your brain waves into their most restorative rhythm. This the enhances the quality of your sleep without waking you up.

Care & Cleaning

Use a cloth dampened with bottled water to gently clean the surface. Let everything dry completely before using again. Clean weekly for best performance.

Smartbuds' wings and tips require regular replacement to continue collecting brain data. Always handle them gently and even if you're only swapping out wings, you’ll need to take the tip off first.

Step 1: Remove the tip. Hold the earbud firmly in one hand. With the other hand, pinch the silicone tip near its base and pull it straight off using a slow, steady motion. Don’t twist or yank—these components are delicate and house important sensors.

Step 2: Remove the wing. Gently peel the wing away from the body of the earbud, starting at one edge and working around. It should come off with light, even pressure—no need to force it.

Step 3: Attach the new wing. Align the new wing so that the cutout fits neatly around the base of the earbud. Stretch the wing gently into place and press it down so it sits flush and snug against the earbud.

Step 4: Attach the new tip. Align the new tip with the nozzle of the earbud. Press it on firmly until it feels secure—you may hear or feel a soft click when it’s in place.

No. Avoid rain, heavy sweat, and any moisture exposure. Do not submerge them in water or wear them in the shower.

Apps & Features

Your sleep routine is the window when you aim to be asleep—from your usual bedtime to your usual wake-up time. Setting it helps us customize your experience, like reminding you to charge your Smartbuds before bed. It doesn’t set an alarm or prevent you from starting a sleep session at a different time. Many users also find it helpful for setting sleep goals and keeping a consistent sleep schedule.

Submit a question or concern through this form
Contact our customer support line: 888-898-8068.

Replacement Ear Tips