Belun® Ring: Top 5 FAQ asked by U.S. Sleep Specialists 

Belun® Ring: Top 5 FAQ asked by U.S. Sleep Specialists 

Belun® Ring: Top 5 FAQ asked by U.S. Sleep Specialists 

The Belun® Ring is the most cost-effective, convenient, and comprehensive way for Home Sleep Apnea screening, diagnosis, titration, and remote patient monitoring. We aim to improve your patients’ sleep quality and increase your clinic’s topline. We have summarized the top FAQ during events asked by numerous Sleep Specialists in the U.S.

Q : What parameters does the Belun® Ring measure?

A: Pulse Oximetry (Pulse Ox) & Pulse Rate by photoplethysmography (PPG) technology, Actigraphy (by Accelerometer)

Q : From what parameters does the Belun® Ring prediction algorithm base? 

A: Our AI algorithm comes up with the bAHI (b= Belun) and sleep stages through PPG, pulse oximetry, pulse rate, pulse rate variability, and actigraphy (Motion Intensity).

Q: Where is the autonomic nervous system response derived from?

A: Pulse Rate Variability

Q: Can Belun® Ring differentiate N1, N2, and N3 during NREM sleep? 

A: Currently, Belun® Sleep System is FDA 510(k) cleared for wake, NREM, and REM. 

Q: How to identify insomnia from the report?

A: Sleep stages: wake, NREM, and REM.

Sleep efficiency, sleep onset latency, and wakefulness after sleep onset (WASO) are also provided. 

How is Belun® Ring different from others? 

A: Belun® Ring is FDA cleared for OSA diagnosis & Sleep stage.

Belun’s sample reports and report interpretation here

We would love to have you test our Belun Ring and get your feedback.

Partnering with Belun :

Up to now, over a hundred organizations, including HK hospital authority hospitals, medical groups, clinic groups, dentists, and elderly centers selected to use the Belun® Sleep SystemBelun® Ring and Sleep App, and Belun® remoVital monitoring system. Many doctors read our medical journal papers, including: 

1) “Belun® Ring Platform: a novel home sleep apnea testing system for assessment of obstructive sleep apnea” (,

2) “Detection of obstructive sleep apnea using Belun® Sleep Platform wearable with neural network based algorithm and its combined use with STOP-Bang questionnaire” (,

3) “Belun® Ring (Belun® Sleep System BLS-100): Deep Learning-Facilitated Wearable Enables OSA Detection, Apnea Severity Categorization, and Sleep Stage Classification in Patients Suspected of OSA”  (, 

4) “Correlation of Pulse Rate Variability(PRV) and Heart Rate Variability(HRV) Metrics During Sleep in Subjects Suspected of OSA” (

If you would like to know more about how to adopt Belun’s solution in your organization, please feel free to contact us to schedule a meeting by filling out the form below: