# K930003: Tubephone Models ER-3A & ER-3 Insert Earphones

- Pathway: 510(k) (Traditional)
- Applicant: Etymotic Research
- Decided: Jun 18, 1993 after 165 days
- Product code: EWO (Audiometer)
- Device class: 2
- Regulation: 21 CFR 874.1050
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
2 later devices descend from it; 2 cite it directly.
0 of 3 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
- K081234: GN Otometrics Insert Earphones (2008), 0 descendants of its own
- K031352: Bio-Logic Insert Earphones (2003), 0 descendants of its own

Source page: https://510kreport.com/device/K930003
Methodology: https://510kreport.com/methodology