RingConn Gen2, purchased December 20, 2025, beautiful condition, matte black, size 9

This is a Ringconn Gen 2, purchased new on December 20, 2025, from Yahoo! Shopping. It comes with a one-year free warranty, so you can use it with peace of mind. (First use was on December 26th.)

I saw other ring colors at Yodobashi Camera, and they were quite noticeable. However, this matte black version is suitable for use in the workplace, so if you are looking for a ring for such purposes, this might be a good fit.

Regarding the condition:
I consider myself quite meticulous, so I took the following precautions. However, upon close inspection, as one naturally uses their hands, there are minor scratches and fine scuffs visible in natural light. These should not be noticeable unless you are extremely particular.

- The ring itself was charged about 5 times, stopping just before a full charge.
(As a side note, the charging case was only charged once. In fact, the case battery hardly depletes.)
- Removed during bathing or cooking (due to concerns about degradation from chemicals, etc. This also applies to extreme conditions like saunas.)
- Used a ring cover even for bodyweight training.
- Worn on the non-dominant hand.

Why am I selling it?

While the accuracy is high and the battery life is good (lasting about 10 days, or 7-8 days in sleep apnea measurement mode), I already own a Pixel Watch 4. Although the Ringconn offers about 20-30% more data accuracy and variety, I found the Pixel Watch 4 to be sufficient for my needs. I also wanted to use this ring to check for sleep apnea tendencies, and having achieved that goal, I decided to sell it.

If you purchase it, I will also send you the electronic receipt from Yahoo! Shopping (my name will be electronically blacked out). The electronic receipt shows reissued as I may have clicked it a few times, but it is sufficient proof of purchase and can be used as evidence when claiming warranty service.

All original accessories are included. The cable is unused.

I plan to ship it in the original Ringconn box, then in the shop's original box, and finally in the dedicated box for Takkyubin Compact. I will also include a ring cover, though it is an inexpensive one.

Furthermore, as there is a unique serial number, I believe there is no possibility of swapping the item. However, please understand that I will not be able to offer support for issues other than initial defects.