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

Ultrahuman AIR is a smart ring activity tracker in a round silver form factor designed for daily monitoring of activity and sleep. The device weighs 2.4 g and has a slim 2.4 mm profile, offering a low-profile, discreet wearable option. It is powered by an internal 24 mAh LiPo battery providing up to six days of typical use and charges via the included USB-C cable. Ultrahuman AIR is compatible with Android 6.0–13.0 and collects continuous data for sleep, movement, skin temperature and heart-rate-derived metrics in a compact ring design.

Advantages

The ring’s lightweight and thin construction makes it comfortable for continuous wear, including during sleep. A six-day battery life reduces the need for frequent charging while USB-C charging ensures straightforward cable compatibility. Built-in tracking covers sleep metrics, skin temperature trends, movement indices and heart-rate variability‑related indicators, enabling consolidated physiological monitoring from a small form factor.

Suitable for

• Everyday activity monitoring and step tracking
• Sleep tracking and sleep quality assessment
• Temperature trend monitoring for wellness insights
• Users seeking a discreet, lightweight wearable for continuous wear

Key specifications

• Form factor: round silver ring, slim 2.4 mm profile
• Weight: 2.4 g
• Battery: Lithium Polymer (LiPo), 24 mAh capacity
• Battery life: up to 6 days (typical use)
• Charging: USB Type-C (cable included)
• Compatibility: Android 6.0–13.0
• Tracked metrics: activity/movement, sleep index, skin temperature, heart-rate-related metrics including HRV insights

How to use

Wear the Ultrahuman AIR ring on a finger where it fits snugly yet comfortably for continuous contact with the skin. Use the included USB-C cable to recharge the device when the battery level is low; typical runtime is up to six days between charges depending on usage. Pair the ring with a compatible Android device to sync recorded data and review sleep, movement and temperature metrics through the companion app. For reliable readings, keep the ring in contact with the skin and follow app prompts for initial setup and pairing.

Usage recommendations

For best results, wear the ring continuously, including overnight, and charge it during predictable downtimes (for example, during showering or a short rest) to maintain the battery without interrupting long-term monitoring. Ensure the ring is snug but not overly tight to preserve sensor contact and comfort.