---
product_id: 745401489
title: "ULTRAHUMAN Ring AIR (Certified Renewed) – Smart Ring Health Tracker, Sleep Tracker, Smart Ring for Men/Women, Fitness Tracker (Sizing Kit, Sizing Kit)"
brand: "ultrahuman"
price: "¥1221"
currency: JPY
in_stock: false
reviews_count: 3
url: https://www.desertcart.jp/products/745401489-ultrahuman-ring-air-certified-renewed-smart-ring-health-tracker-sleep
store_origin: JP
region: Japan
---

# 10 sizes for perfect fit Comprehensive sleep & recovery tracking Multi-biomarker health insights ULTRAHUMAN Ring AIR (Certified Renewed) – Smart Ring Health Tracker, Sleep Tracker, Smart Ring for Men/Women, Fitness Tracker (Sizing Kit, Sizing Kit)

**Brand:** ultrahuman
**Price:** ¥1221
**Availability:** ❌ Out of Stock

## Summary

> 💍 Unlock your health potential—wear the future on your finger.

## Quick Answers

- **What is this?** ULTRAHUMAN Ring AIR (Certified Renewed) – Smart Ring Health Tracker, Sleep Tracker, Smart Ring for Men/Women, Fitness Tracker (Sizing Kit, Sizing Kit) by ultrahuman
- **How much does it cost?** ¥1221 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/745401489-ultrahuman-ring-air-certified-renewed-smart-ring-health-tracker-sleep)

## Best For

- ultrahuman enthusiasts

## Why This Product

- Trusted ultrahuman brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Featherlight & Discreet:** At just 3.7 grams, this smart ring blends seamlessly into your lifestyle without weighing you down.
- • **Women’s Health, Elevated:** Advanced cycle, ovulation, and pregnancy tracking with personalized biomarker insights for every phase.
- • **Tailored Fit, Zero Guesswork:** Sizing kit ensures your Ultrahuman Ring AIR fits like a glove—no returns, no hassle.
- • **All-Day Health Command Center:** Track sleep, stress, heart health, workouts, and recovery with precision to optimize your daily performance.
- • **Certified Renewed, Guaranteed Quality:** Professionally inspected and backed by a 1-year warranty—premium tech with sustainable peace of mind.

## Overview

The ULTRAHUMAN Ring AIR (Certified Renewed) is a sleek, lightweight smart ring designed for comprehensive health and fitness tracking. Available in 10 precise sizes via a dedicated sizing kit, it monitors sleep, activity, stress, heart health, and women’s health metrics including ovulation and pregnancy. Each ring is professionally inspected, carries a 1-year warranty, and offers personalized biomarker insights to empower millennial professionals to optimize wellness with style and confidence.

## Description

Product description Understand Your Sleep Quality & Quantity Understand Your Day-to-Day by Cycle Tracking Decode How Your Body Responds to Stress Know When to Push or When to Pause Track Your Journey of Pregnancy Week-by-Week Space-Grade Titanium Up to 6 Days Battery Life No Distractions As Light as 2.4 gms Designed for Comfort Water Resistant up to 100m

Review: Práctico - Más fácil para poder saber tu talla para el ultrahuman ring
Review: Works great! - Perfect price to be able to buy before hand before ordering the ring itself. They fit exactly like the actual ring and I’m very pleased with my sizing results.

## Features

- CERTIFIED RENEWED BY ULTRAHUMAN: Each Certified Renewed Ring AIR undergoes professional inspection and testing to meet Ultrahuman's performance standards. The ring may feature a unique visual signature due to the manufacturing process, making no two rings look identical. Enjoy your Certified Renewed Ring AIR with confidence, backed by a 1-year manufacturer warranty.
- To Claim warranty reach out to the customer support via Ultrahuman app and share the desertcart invoice, rest all will be taken care of.
- BUY THE SIZING KIT FIRST: Ultrahuman Ring sizes differ from standard ring sizes. Purchase the Ultrahuman Sizing Kit first, which includes a ring sizer, to accurately determine your size. The Ring AIR is available in 10 sizes (5-14), ensuring a comfortable, secure fit. Using the sizing kit helps you avoid returns and exchanges, ensuring you select the right size before purchasing.
- COMPREHENSIVE HEALTH TRACKING: The Ultrahuman Ring measures a wide range of metrics including sleep, activity, stress, heart health, movement, workouts, and recovery. Stay on top of your health and fitness goals with detailed insights to optimize your performance and well-being.
- WOMEN’S HEALTH INSIGHTS: With Ultrahuman Ring's advanced women's health features, track ovulation, cycles and pregnancy. Through multi-biomarker-based tracking for those looking to conceive, predict a 7-day fertile window and pinpoint ovulation with precision. Access cycle tracking combined with biomarker-based personalized guidance for every phase (Menstruation, Ovulation, Follicular, and Luteal). With Pregnancy Mode, expecting mothers get tailored pregnancy insights throughout each trimester.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D7956WT1 |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | #158,369 in Electronics ( See Top 100 in Electronics ) #399 in Smart Rings |
| Customer Reviews | 4.4 4.4 out of 5 stars (289) |
| Date First Available | July 16, 2025 |
| Item Weight | 3.7 Grams |
| Item model number | UHRA-BRG-05-WBSB |
| Manufacturer | Ultrahuman Healthcare Pvt Ltd |
| Memory Storage Capacity | 0.5 MB |
| Package Dimensions | 7.6 x 4.53 x 1.34 inches |

## Product Details

- **Battery Capacity:** 24 Milliamp Hours
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** ULTRAHUMAN
- **Connectivity Technology:** Bluetooth
- **GPS:** No GPS
- **Memory Storage Capacity:** 0.5 MB
- **Operating System:** Ultrahuman App
- **Shape:** Round
- **Special Feature:** Activity Tracker
- **Wireless Communication Standard:** Bluetooth

## Images

![ULTRAHUMAN Ring AIR (Certified Renewed) – Smart Ring Health Tracker, Sleep Tracker, Smart Ring for Men/Women, Fitness Tracker (Sizing Kit, Sizing Kit) - Image 1](https://m.media-amazon.com/images/I/81UQzOLIkwL.jpg)
![ULTRAHUMAN Ring AIR (Certified Renewed) – Smart Ring Health Tracker, Sleep Tracker, Smart Ring for Men/Women, Fitness Tracker (Sizing Kit, Sizing Kit) - Image 2](https://m.media-amazon.com/images/I/71Z2x+LPTcL.jpg)
![ULTRAHUMAN Ring AIR (Certified Renewed) – Smart Ring Health Tracker, Sleep Tracker, Smart Ring for Men/Women, Fitness Tracker (Sizing Kit, Sizing Kit) - Image 3](https://m.media-amazon.com/images/I/81bzA756mNL.jpg)
![ULTRAHUMAN Ring AIR (Certified Renewed) – Smart Ring Health Tracker, Sleep Tracker, Smart Ring for Men/Women, Fitness Tracker (Sizing Kit, Sizing Kit) - Image 4](https://m.media-amazon.com/images/I/71myH98rh6L.jpg)
![ULTRAHUMAN Ring AIR (Certified Renewed) – Smart Ring Health Tracker, Sleep Tracker, Smart Ring for Men/Women, Fitness Tracker (Sizing Kit, Sizing Kit) - Image 5](https://m.media-amazon.com/images/I/81Zs2jMdEOL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Práctico
*by K***A on October 16, 2025*

Más fácil para poder saber tu talla para el ultrahuman ring

### ⭐⭐⭐⭐⭐ Works great!
*by D***I on August 30, 2025*

Perfect price to be able to buy before hand before ordering the ring itself. They fit exactly like the actual ring and I’m very pleased with my sizing results.

### ⭐⭐⭐⭐⭐ Easy to wear and use
*by K***M on October 2, 2025*

I like the ring, the sizing box came first so I could look at the ring colors and try the fit first, it is customizable for my health progress and I can choose to add things to help keep track I would definitely recommend this to others

## Frequently Bought Together

- ULTRAHUMAN Ring Air-Smart Ring Activity Tracker, Size First Sizing Kit,Sleep Tracker,Smart Ring for Men/Women,Fitness Tracker (Sizing Kit, Swatch Sizing Kit), Black
- Ring Sizer Measuring Tool with Magnifying Glass,Reusable Finger Size Gauge Jewelry Sizing Tool 1-17 USA Rings Size 2Pcs

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**Shop now:** [https://www.desertcart.jp/products/745401489-ultrahuman-ring-air-certified-renewed-smart-ring-health-tracker-sleep](https://www.desertcart.jp/products/745401489-ultrahuman-ring-air-certified-renewed-smart-ring-health-tracker-sleep)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-19*