Belun is a medical technology company that offers FDA-cleared wearable devices and a proprietary AI-powered open platform to empower medical professionals to provide personalized care and enable early risk detection through longitudinal monitoring. Founded in 2016, Belun is headquartered in Hong Kong and Singapore, with research and development operations in Taiwan. The company’s core team comprises medical device researchers with experience in artificial intelligence, product development, and medical quality management.

Working closely with medical experts in sleep medicine, cardiology, psychology, and psychiatry across the United States, Hong Kong, and Taiwan, Belun is dedicated to providing easy-to-use and evidence-based solutions for medical and healthcare applications.

Belun Ring

The Belun Ring BLR-100X is an FDA 510(k) Class II-cleared wearable medical device designed for healthcare professionals requiring high-quality, medical-standard patient data for sleep health assessment and sleep apnea diagnosis. Powered by the Belun Sleep System (BLS-100), the device combines advanced hardware with clinically validated AI algorithms to analyze physiological signals and generate actionable sleep health insights.

Designed as an easy-to-use and affordable solution with medical-grade accuracy, the Belun Ring captures key physiological measurements, including oxygen saturation (SpO₂), pulse rate through beat-to-beat pulse period analysis, photoplethysmography (PPG), and actigraphy. The collected data is processed through the Belun Sleep System to generate clinical metrics such as the apnea-hypopnea index (bAHI), sleep stages including wake, REM, and NREM phases (bSTAGES), and autonomic nervous system (ANS) responses.

By enabling continuous and data-driven sleep monitoring, the Belun Ring BLR-100X enables medical professionals to evaluate sleep health and identify potential sleep-related conditions through a non-invasive wearable platform.

Testimonials

“It offers huge support in monitoring vital sign changes with patients wearing the ring; the system automates health monitoring continuously. In addition, our caretakers are alerted when abnormal changes in vital signs trigger an alarm, allowing them to provide immediate support.” — Wan Wah Care & Attention Home for the Elderly, Hong Kong Young Women’s Christian Association

“My husband found out my snoring is getting worse, and sometimes, my breathing stops, which terrifies him. The sound even wakes up my kids when we sleep together. Everyone wouldn’t get a good night’s sleep! In addition, I still feel tired after sleeping a lot, so I wanted to test whether I have sleep apnea.

Belun’s sleep apnea report let me know that my snoring had reached a dangerous level, and the data confirmed that I did have sleep apnea. After reading my sleep apnea report, my doctor immediately confirmed it and placed me in a sleep lab for my later anesthesia delivery. Belun’s sleep apnea test gave me peace of mind.”— Sally, Sleep Apnea Diagnosis

When I wake up, most of the time I still feel tired. I’m not sure if it’s due to lack of sleep or if I have sleep apnea or other factors. This was when I decided to try the Belun® Ring.

The Belun® Ring was simple to use, like wearing a ring. I did not feel it at all while I slept and was able to sleep as usual. It saved me the trouble of staying at a hospital overnight.

After wearing it for three nights, Belun® sent me a detailed report with charts and detection results. The report confirmed that I did not have sleep apnea, but it identified many habits that I should correct in order to achieve high-quality sleep.

I highly recommend it to those who want to have better sleep!”— Kenneth Ip, Sleep Monitoring Experience

DR. LYDIA LEUNG | CEO

Dr. Lydia Leung is the CEO of Belun Technology, where she leads the development of wearable medical technologies and AI-powered healthcare solutions designed to advance sleep health monitoring, preventive healthcare, and risk detection. With expertise in sensor technology, biomedical signal processing, artificial intelligence, and medical device innovation, she has played a key role in advancing Belun’s medical-grade wearable solutions, including the Belun Ring and AI-powered health monitoring platforms.

Before joining Belun Technology, Dr. Leung served as Director of the Opto-Electronic Technology Division at ASTRI, where she established and led medical and healthcare electronics initiatives focused on medical devices, telehealth systems, and chronic disease management technologies. She holds a PhD, MPhil, and BEng in Electrical and Electronic Engineering from The Hong Kong University of Science and Technology and has contributed to research in engineering and healthcare technology.

Under her leadership, Belun has developed FDA-cleared wearable medical devices and AI-powered platforms that support sleep disorder screening, sleep health management, and longitudinal health monitoring.