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Voltery Pulse - Sleep Tracking

Voltery Smart Ring X2 (Sleep Tracking)

★★★★☆ 4.2 · All reviews
$249 $299Save $50

A comfortable, accurate fit helps your Voltery Smart Ring X2 maintain consistent sensor contact throughout the night. Choose the sizing option that works best for you.

Finish - Gunmetal
SizeHow sizing works →
Your Voltery X2 should feel secure and comfortable without being overly tight. The ring should remain in contact with your skin throughout the night without rotating freely.
Select your US ring size:
7
8
9
10
11
12
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ADVANCED SLEEP TRACKING

Understand what happens while you sleep.

Voltery X2 tracks your sleep throughout the night, helping you understand sleep duration and the time spent in light, deep, and REM sleep - all presented in one easy-to-read sleep summary.

SLEEP SCORE

One number for a clearer view of your night.

Your overnight sleep signals are brought together into a simple daily sleep score, giving you an at-a-glance view of how well you rested and helping you recognize changes over time.

NIGHTTIME HEART & HRV

Your recovery story continues while you sleep.

X2 tracks resting heart rate and heart rate variability (HRV) overnight, helping you understand how your body responds to activity, stress, rest, and changes in your daily routine.

SKIN TEMPERATURE

Notice subtle changes from night to night.

X2 monitors nighttime skin temperature trends, adding another useful signal to your sleep and recovery data and helping you identify changes from your personal baseline.

Specification - Voltery Smart Ring X2

MaterialLightweight titanium, three finishes
Battery lifeUp to 7 days
ChargingMagnetic charging case, included
Water resistance5 ATM
Sizes availableUS sizes 7-12
SensorsPPG heart rate, SpO₂, skin temperature, accelerometer
Heart TrackingResting heart rate & overnight HRV
Blood OxygenOvernight SpO₂ trend monitoring
Temperature TrackingNighttime skin temperature trends
ConnectivityBluetooth 5.3, Voltery app (iOS & Android)
SubscriptionNone - core app insights included

How Pulse compares.

Placeholder competitor columns - swap in real brands once the final spec sheet is locked.

FeatureVolteryBrand ABrand BBrand C
No subscription, ever✓✓--
7–10 day battery life✓-✓-
Free sizing kit✓✓✓-
Titanium shell, 3 finishes✓--✓
Lifetime warranty option✓---

What's in the Box

What early wearers are saying

4.2★★★★☆ Reviews
★★★★

“The sleep insights are the first thing I check every morning. Seeing my deep, light, and REM sleep has helped me understand which habits actually improve my rest.”

Sophia M. - Verified buyer
★★★★★

“I hardly notice the X2 while sleeping. The sleep score and overnight recovery insights give me a simple picture of how well I’ve rested before starting my day.”

Daniel R. - Verified buyer
★★★★★

“I bought the X2 mainly for sleep tracking, and that’s where it really fits my routine. I like being able to compare my sleep and recovery trends without wearing a watch to bed.”

Anna K. - Verified buyer

Questions, answered.

What does the Voltery Smart Ring X2 track? +
Voltery X2 is designed with a focus on sleep and overnight wellness. It tracks sleep duration, sleep stages, resting heart rate, HRV, blood oxygen trends, skin temperature trends, recovery, and everyday activity.
How does Voltery X2 track my sleep?+
Wear X2 while you sleep and its built-in sensors continuously collect relevant overnight signals. The Voltery app organizes this information into sleep stages, trends, and easy-to-understand sleep insights.
Which sleep stages can Voltery X2 track? +
X2 estimates time spent in light, deep, and REM sleep, along with your overall sleep duration, helping you better understand the structure of your night's rest.
Does Voltery X2 provide a sleep score? +
Yes. X2 combines relevant overnight sleep signals into a simplified sleep score so you can quickly understand your night and compare your sleep patterns over time.
Does it track heart rate and HRV overnight? +
Yes. Voltery X2 tracks resting heart rate and heart rate variability (HRV) while you sleep, providing additional information about your overnight recovery and wellness trends.