# K024100: IF Series True Sine Interferential Stimulator/Model: WL-2206, Well IF, Life IF and the Customer Private Brand

- Pathway: 510(k) (Traditional)
- Applicant: Theratech, Inc.
- Decided: Feb 25, 2003 after 75 days
- Product code: LIH (Interferential Current Therapy)
- Device class: 2
- Regulation: 21 CFR 882.5890
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 2 generations back to K921441 (1992). 3 ancestors in all.
6 later devices descend from it; 1 cites it directly.
0 of 10 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K930535: IF400, Skylark Device Co., Ltd. (1994) Summary page 1.
- K952683: Apex Medical Corp. Portable Interferential Stimulation Device, Wholesale Medical Imports, Inc. (1997) Summary page 1.

## Most influential descendants
- K050847: IF True Sine Interferential Stimulator, Model WL-2206A (2005), 5 descendants of its own
- K060975: IF True Sine Interferential Stimulator / Model WL-2206A1 & WI-2206A2 (2006), 3 descendants of its own
- K090023: IF Series True Sine Interferential Stimulator, Model: WL-2206B and WL-2106E (2009), 2 descendants of its own
- K092763: IF True Sine Interferential Stimulator, WL-2206D (2009), 1 descendant of its own
- K110509: Everyway Interferntial Stimulator, Model IF-908 (2011), 0 descendants of its own

## Indications for use
The device is an interferential stimulator with TENS indications used for symptomatic relief and management of chronic intractable pain.

Source page: https://510kreport.com/device/K024100
Methodology: https://510kreport.com/methodology