# K060975: IF True Sine Interferential Stimulator / Model WL-2206A1 & WI-2206A2

- Pathway: 510(k) (Special)
- Applicant: Theratech, Inc.
- Decided: May 10, 2006 after 30 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: 4 generations back to K921441 (1992). 5 ancestors in all.
3 later devices descend from it; 1 cites it directly.
0 of 9 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K050847: IF True Sine Interferential Stimulator, Model WL-2206A, Theratech, Inc. (2005) Summary page 1.

## Most influential descendants
- 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
- K100399: 4 Channels Multiple Model Digital Electrical Stimulator, Model Nuvostim IV, WL-2504A (2010), 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/K060975
Methodology: https://510kreport.com/methodology