Smart ring activity tracker Ultrahuman AIR — Silver, 6-day battery, LiPo 24 mAh, USB-C charging

The Ultrahuman AIR smart ring in Silver is a compact, round activity tracker engineered for continuous wear and unobtrusive monitoring of daily activity and sleep. Weighing 2.4 g and 2.4 mm thin, the ring offers a minimalist profile intended to feel lightweight and comfortable for all-day use. It incorporates sensors for sleep, temperature, heart-rate related metrics and movement tracking, and pairs with compatible mobile devices to deliver insights through the Ultrahuman ecosystem. The device charges via the included USB-C to USB-C cable and uses a 24 mAh LiPo battery rated for up to 6 days of runtime. Compatible with Android 8.0–13.0 and iOS 15–16, the Ultrahuman AIR is designed for users seeking continuous biometric monitoring in a discreet form factor.

Advantages

The Ultrahuman AIR combines a very low weight and slim profile with multi-day battery life, enabling continuous wear without frequent charging. Built-in capabilities include sleep analysis with a consolidated Sleep Index, skin temperature tracking for physiological monitoring, and movement-based metrics to support daily activity goals. Heart-rate variability (HRV) insights and personalized nudges help users monitor recovery and make informed choices about activity and rest. USB-C charging and broad smartphone compatibility simplify setup and daily use.

Suitable for

• All-day wearable biometric monitoring for people who prefer minimal, discreet devices
• Sleep tracking and sleep quality assessment using a unified Sleep Index
• Temperature trend monitoring to detect physiological changes
• Activity tracking focused on movement index and non-exercise energy use
• Users who want HRV-based recovery insights and personalised nudges

Key specifications

• Weight: approximately 2.4 grams
• Thickness: approximately 2.4 mm
• Battery type and capacity: LiPo 24 mAh
• Battery runtime: up to 6 days on a single charge (typical use)
• Charging interface: USB Type-C (USB-C to USB-C cable included)
• Compatibility: Android 8.0–13.0 and iOS 15–16
• Form factor: round, silver, low-profile ring designed for continuous wear
• Primary tracked metrics: sleep index, skin temperature trends, movement index, heart-rate variability (HRV) insights

How to use

Wear the Ultrahuman AIR on a finger that feels comfortable and allows a snug but not tight fit to ensure consistent sensor contact with the skin. Pair the ring with a compatible Android or iOS device using the Ultrahuman mobile app and follow the in-app pairing and setup instructions. Charge the ring with the supplied USB-C to USB-C cable when the app indicates low battery; typical runtime is up to six days depending on usage patterns. For continuous monitoring, keep the ring on overnight to capture sleep data and during daytime activities to record movement and temperature trends.

Usage recommendations

For best results, wear the ring consistently in the same position and keep the sensor area clean and dry. Charge the device regularly before battery depletion and update the Ultrahuman app and device firmware when prompted to benefit from improved metrics and nudges. Use the Sleep Index, movement index and HRV insights together to form a balanced view of activity, recovery and sleep patterns.