COLMI Ring 2 Pro Titanium Smart Ring

The COLMI Ring 2 Pro is a screen-free smart ring for sleep and health tracking, with Bluetooth connectivity and a claimed titanium construction. It may suit buyers who prefer an unobtrusive wearable, but sizing and several listing details deserve attention before ordering.

At a glance

No display, so the ring is intended to be used with a smartphone for its reports.
Listing claims sleep-stage tracking and AI-generated health insights without a subscription fee.
Manufacturer says the included charging case can provide up to 20 charging cycles.

Price

$84.98Save 15%

Reference price: ~~$99.98~~

Price checked: Nov 14, 2026

View offer

Pros and cons

Pros

Screen-free ring format avoids wearing a watch-style display.
Sleep, heart-rate and blood-oxygen monitoring are listed, alongside AI health reports with no subscription fee claimed.
The listing describes a charging case and an additional decorative ring.

Cons

No display means information is viewed through a smartphone rather than directly on the ring.
The listed 4–5 day battery claim applies only to basic mode, which tracks steps and basic sleep data.

Technical specifications

15 specifications

Identity
Brand	COLMI
Model	COLMI Ring 2 Pro

Display and video
Screen technology listed	No Display

Connectivity and controls
Wireless connection listed	Bluetooth
Compatible operating systems listed	Android, iPhone
Compatible device	Smartphone

Health and tracking
Listed features	Blood Oxygen Monitoring, Heart Rate, Sleep Measurement
GPS	No GPS

Power and battery
Battery type	Lithium Polymer

Dimensions and installation
Form factor	Round
Listed width	7mm

Materials and protection
Water resistance listed	Waterproof
Listed water resistance depth	50 meters
Band material	Titanium

Appearance
Color	Gold

What to know before buying

Listing details to confirm

Listing details are inconsistent or unconfirmed: water resistance is described as both “Waterproof” and “50 meters,” while a feature claims 5ATM. Battery life of 4–5 days is stated only for basic mode, and the case is described as providing either 20 charges or 20 times of charging effect. Confirm the intended size using the sizing kit and wear it for 24 hours, as advised by the manufacturer. A separate feature list gives a different kit inventory from the accessory claim, so check the selected listing for package contents.

What’s in the box

Smart ringCheck selected pack
Decorative ringCheck selected pack
Charging caseCheck selected pack
Ring cover or protectorCheck selected pack
Charging cableCheck selected pack
Instruction manualCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Buyers seeking a screen-free wearable for sleep and basic health-tracking trends.
People who want Bluetooth syncing to an Android phone or iPhone and are willing to check reports in an app.
Shoppers interested in a titanium-look ring with an additional decorative ring claimed.

Less suited to

Anyone needing GPS on the ring itself.
Buyers who want a screen for at-a-glance readings or want an independently established water-resistance rating.

COLMI Ring 2 Pro Titanium Smart Ring · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 35 ratings

5 stars74%74%
4 stars26%26%
3 stars0%0%
2 stars0%0%
1 star0%0%

The supplied evidence contains aggregate ratings but no customer-comment summary. The overall rating distribution is positive, with the reported ratings in the four- and five-star categories. Ratings alone do not establish why customers were satisfied or how the ring performs, so weigh them separately from the listing’s unverified tracking, battery and water-resistance claims.

Frequently asked questions

Does the COLMI Ring 2 Pro have a display?

No. The listing specifies “No Display,” so use a connected smartphone to view reports.

How long does the battery last?

The listing gives 4–5 days for basic mode, described as tracking steps and basic sleep data. It does not establish that runtime for other modes.

Is the ring suitable for swimming?

The listing claims 5ATM and also says “Waterproof” and “50 meters.” These descriptions are inconsistent, so confirm the applicable water-resistance guidance before wearing it in water.

What is included in the package?

The listing claims a decorative ring and charging case. Another accessories list names a ring, ring cover, portable charging case, charging cable and instruction manual. Check the selected listing to confirm the contents.