Wellue O2Ring — Wearable Overnight Pulse Oximeter

The Wellue O2Ring is a wearable overnight pulse oximeter that sits comfortably on your finger and tracks your blood oxygen (SpO2), pulse rate and movement every second while you sleep — no clip, no dangling wire, no waking up to take a reading. When your oxygen dips below a level you set, the ring gives a gentle, silent vibration on your finger instead of a loud beep, so you (and your partner) stay undisturbed.

Unlike a fingertip pulse oximeter that gives you a single spot-check reading, the O2Ring records continuously through the night and builds a detailed report you can review in the morning — and share with your GP or sleep specialist.

Key Features

• Continuous overnight recording — captures SpO2, pulse rate and motion every second, not just a one-off snapshot.
• Silent vibration alert — five adjustable intensity levels; a gentle buzz can prompt a position change, or a stronger setting can rouse you when oxygen drops.
• Detailed reports, no subscription — the free iOS and Android app charts your night and exports PDF or CSV reports to share with your doctor.
• Works with SleepHQ and OSCAR — import your overnight oximetry data alongside your CPAP data for a complete view of your therapy.
• Comfortable soft-silicone ring — flexible fit that stays put overnight without the pressure or numbness of a clip sensor.
• Wear-to-start simplicity — powers on automatically when worn; stores up to four sessions on board and syncs via Bluetooth.
• Rechargeable — around 16 hours per charge, recharging fully in 2–3 hours.
• Trend tracking — review nightly, weekly and monthly oxygen trends to see how things change over time.

Who Is This For?

The O2Ring suits anyone who wants to understand what their oxygen levels are actually doing overnight. That includes people on CPAP therapy who want to confirm their treatment is keeping desaturations in check, people who snore or suspect sleep apnea (or sleep apnoea) and want data to take to a GP, and those monitoring general respiratory wellbeing at home. It's equally at home for daytime use during exercise, rest or travel. If you only need an occasional on-the-spot reading rather than a full night's recording, our Suresense Premium SpO2 oximeter or Heart Sure Pulse Oximeter A320 are simpler fingertip options.

How It Helps Alongside CPAP Therapy

A good nightly average can still hide brief oxygen drops caused by mask leaks, pressure that isn't quite right, or positional issues. Because the O2Ring records every second of the night, it gives you a real-time safety net — vibrating if your SpO2 falls below your chosen threshold — and a morning report that shows exactly when and how often drops occurred. It's a practical way to keep an eye on how well your CPAP machine is working between specialist appointments, with data you can hand straight to your clinician.

For users who track their CPAP data in SleepHQ or OSCAR, the O2Ring's recording file imports directly into either platform — so you can see your overnight SpO2 readings overlaid against your CPAP events on a single timeline. It's the complete picture serious users want.

What's in the Box

• Wellue O2Ring Continuous Ring Oxygen Monitor
• Micro USB charging cable
• User guide