# K180174: Belun Ring

- Pathway: 510(k) (Traditional)
- Applicant: Belun Technology Company Limited
- Decided: May 29, 2018 after 127 days
- Product code: DQA (Oximeter)
- Device class: 2
- Regulation: 21 CFR 870.2700
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 3 generations back to K001085 (2000). 3 ancestors in all.
4 later devices descend from it; 1 cites it directly.
0 of 8 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K070371: Fingertip Pulse Oximeter MD300C, Beijing Choice Electronic Technololgy Co., Ltd. (2007) Summary page 4.

## Most influential descendants
- K191417: Belun Ring (2019), 3 descendants of its own
- K211407: Belun Ring BLR-100X (2021), 2 descendants of its own
- K221361: circul™ pro Ring (2023), 1 descendant of its own
- K234110: Belun Ring BLR-200 (BLR-200) (2024), 0 descendants of its own

## Indications for use
Belun Ring BLR-100 is a non-invasive and stand-alone pulse oximeter, intending for spot-checking of oxygen saturation of arterial hemoglobin (SpO2) and the pulse rate of adult patients through index finger in hospital and home environment. It is not intended for single-use and out-of-hospital transport use.

Source page: https://510kreport.com/device/K180174
Methodology: https://510kreport.com/methodology