# K121696: Wireless Thermometer

- Pathway: 510(k) (Traditional)
- Applicant: Raling Medical Company
- Decided: Oct 11, 2012 after 126 days
- Product code: FLL (Continuous Measurement Thermometer)
- Device class: 2
- Regulation: 21 CFR 880.2910
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 6 generations back to K010462 (2001). 8 ancestors in all.
36 later devices descend from it; 1 cites it directly.
0 of 45 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K100226: Wireless Body Temperature Monitor Model BTM-Dix Series (BTM-Dic,D,E,F,G & H), Rio Flexon Technology Co., Ltd. (2010) Summary page 1.

## Most influential descendants
- K132761: Wireless Thermometer (2014), 35 descendants of its own
- K160306: Cloud Smart Thermometer (2016), 27 descendants of its own
- K181013: Fever Scout (2018), 26 descendants of its own
- K191272: Wearable Device, Wearable Package (2019), 16 descendants of its own
- K210133: Current Health Monitoring System Gen 2 (G2) (2021), 8 descendants of its own

## Indications for use
The Wireless Thermometer, model WTIM-B530-l, is a battery-operated elected electronic device with intended use of measuring and monitoring human armpit temperature continuously via wireless signal transmission of the measuring result. This system is reusable and is intended for armpit temperature monitoring for persons over two years old.

Source page: https://510kreport.com/device/K121696
Methodology: https://510kreport.com/methodology