Introduction
The ULTRAHUMAN Ring AIR is a sophisticated smart ring designed to provide comprehensive health and fitness tracking. It monitors a wide array of metrics to help users optimize their performance and overall well-being. This manual provides essential information for setting up, operating, and maintaining your Ring AIR.

Image: The ULTRAHUMAN Ring AIR, showcasing its sleek design and internal sensor technology.
Key features include:
- Comprehensive Health Tracking: Measures sleep, activity, stress, heart health, movement, workouts, and recovery.
- Advanced Sleep Tracking: Provides detailed insights into all sleep stages (REM, Deep Sleep, Light Sleep, Wakefulness) and offers actionable steps for improvement.
- Women's Health Insights: Features for tracking ovulation, cycles, and pregnancy, including multi-biomarker-based tracking for fertility and tailored pregnancy insights.
- Minimal Form Factor & Durability: Crafted from space-grade titanium, lightweight, and water-resistant up to 100m.
- No Subscription Required: Essential standard features are available without a subscription via the Ultrahuman App.
- HSA/FSA Eligible: Can be purchased using health savings or flexible spending accounts.
Sizing and Setup
To ensure optimal performance and comfort, it is crucial to determine your correct ring size using the Ultrahuman Sizing Kit before purchasing the Ring AIR. Ultrahuman Ring sizes may differ from standard ring sizes.
Step 1: Obtain the Sizing Kit
Purchase the Ultrahuman Sizing Kit. This kit includes a set of ring sizers to help you find the perfect fit.

Image: Visual guide showing the three steps: ordering the sizing kit, purchasing the Ring AIR, and downloading/pairing with the app.
Step 2: Find Your Snug Fit
Try multiple sizes from the sizing kit on your index, middle, or ring finger until you find a snug fit. The Ring AIR is available in 10 sizes (5-14).

Image: A person trying on a sizing ring to ensure a snug fit on their finger.
Step 3: Two-Night Sizing Test
Wear your mock ring from the sizing kit overnight to ensure it is not too loose or too tight. This helps account for natural finger swelling that can occur during sleep.

Image: A person sleeping, demonstrating the two-night sizing test with a mock ring.
Step 4: Choose Your Color and Purchase
Once you have confirmed your ideal size, select your preferred color from the available options (Bionic Gold, Raw Titanium, Space Silver, Matte Grey, Aster Black, Brushed Rose Gold) and proceed with your purchase.

Image: A display of the different color options available for the Ultrahuman Ring AIR.
Step 5: App Download and Pairing
Download the Ultrahuman App from your device's app store. Follow the in-app instructions to pair your Ring AIR and begin your health journey.
Operating the Ring
The ULTRAHUMAN Ring AIR continuously collects data throughout the day and night. All insights are accessible through the dedicated Ultrahuman App.
Comprehensive Health Tracking
The ring tracks various health metrics, providing a holistic view of your well-being. These include:
- Sleep & Recovery: Detailed analysis of sleep stages, sleep debt, and recovery scores.
- Activity: Tracks steps, calories burned, and workout intensity.
- Heart Health: Monitors Heart Rate (HR), Heart Rate Variability (HRV), and Resting Heart Rate (RHR).
- Stress: Provides a unique "Stress Rhythm Score" based on HR, HRV, and RHR against your circadian rhythm.
- Skin Temperature: Tracks variations in skin temperature.

Image: An overview of the comprehensive health tracking features provided by the Ultrahuman Ring AIR.
Advanced Sleep Insights
The Sleep Index provides a score based on your sleep quality, with contributors like total sleep, time in bed, restorative sleep, and HR drop. The app offers actionable nudges to improve your sleep patterns.

Image: A user sleeping, with an overlay of the Ultrahuman app showing detailed sleep insights and a Sleep Index score.
Women's Health Insights
For women, the Ring AIR offers specialized tracking for menstrual cycles, ovulation, and pregnancy. It can predict fertile windows and provide personalized guidance through different phases.

Image: A woman wearing the Ring AIR, with the app displaying advanced women's health insights, including cycle and ovulation tracking.
PowerPlugs
PowerPlugs are individual apps and plugins within the Ultrahuman ecosystem that allow you to focus on specific health aspects. Examples include Cardio Adaptability, Screentime, and Caffeine Window.

Image: A screenshot from the Ultrahuman app showcasing the PowerPlugs feature, offering various specialized health insights.
Battery Management: Chill Mode
The Ring AIR features an intelligent battery system, including "Chill Mode," designed to optimize battery life without compromising essential tracking. This mode boosts battery life by up to 35% by intelligently tracking only what matters, when it matters.
Chill Mode utilizes motion and context-based intelligence to capture heart rate and temperature primarily during sleep and restful periods. It optimizes sensor use during the day to reduce power consumption while still providing accurate sleep, recovery, and night-time heart rate and temperature insights.
Video: An official video from Ultrahuman US introducing "Chill Mode" and explaining how it optimizes the Ring AIR's battery life by intelligently managing sensor activity.
Maintenance
Charging
To charge your Ultrahuman Ring AIR, place it on the provided Ring Charger. Connect the charger to a power source using the included Type C to Type C Cable. A full charge typically lasts for several days, depending on usage.
Durability and Care
The Ring AIR is constructed from space-grade titanium, making it highly durable and lightweight. It is water-resistant up to 100m, suitable for swimming and daily wear. To maintain its appearance, clean the ring periodically with a soft, damp cloth. Avoid harsh chemicals or abrasive materials.

Image: The components included in the product box: the Ultrahuman Ring AIR, its charging dock, and a Type C to C charging cable.
Troubleshooting
For most issues, refer to the Ultrahuman App's help section or frequently asked questions. The app provides detailed diagnostics and solutions for common problems such as syncing delays or battery inconsistencies.
- Connectivity Issues: Ensure Bluetooth is enabled on your device and the ring is within range. Try restarting your phone and the app.
- Battery Life: If battery life is shorter than expected, ensure "Chill Mode" is enabled. Avoid extreme temperatures.
- Inaccurate Readings: Ensure the ring is worn snugly on your finger. Refer to the app for calibration tips if available.
If problems persist, contact Ultrahuman customer support through the app or their official website for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Brand | ULTRAHUMAN |
| Model Number | RA-RT-Size14-US |
| Item Weight | 3.7 Grams (0.131 ounces) |
| Battery Type | 1 Lithium Polymer battery (included) |
| Battery Capacity | 24 Milliamp Hours |
| Connectivity | Bluetooth |
| Operating System | Ultrahuman App |
| Water Resistance | Up to 100m |
| Material | Space-grade Titanium |
Warranty and Support
The ULTRAHUMAN Ring AIR is HSA/FSA eligible, allowing you to use your health savings or flexible spending account for purchase. For detailed warranty information and customer support, please visit the official ULTRAHUMAN website or contact their support team directly. Information regarding protection plans may also be available at the point of purchase.
Online Support: Visit the ULTRAHUMAN Store on Amazon