# K930535: IF400

- Pathway: 510(k) (Traditional)
- Applicant: Skylark Device Co., Ltd.
- Decided: Jun 14, 1994 after 497 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
No predicates in its family tree.
15 later devices descend from it; 2 cite it directly.
0 of 16 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA lists a 510(k) statement for it but has not posted the file, so its predicates are not known.

## Most influential descendants
- K032719: GM3 Series IF Tens, Model GM3X2IF (Where X IS a Parameter of Different Housing) (2003), 7 descendants of its own
- K024100: IF Series True Sine Interferential Stimulator/Model: WL-2206, Well IF, Life IF and the Customer Private Brand (2003), 6 descendants of its own
- 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
- K120054: Ultima Neo (2012), 2 descendants of its own

Source page: https://510kreport.com/device/K930535
Methodology: https://510kreport.com/methodology