# K210756: Neck Care Therapy, Model: AST-905A, AST-905D, AST-905H

- Pathway: 510(k) (Traditional)
- Applicant: Shenzhen Osto Technology Company Limited
- Decided: Jun 11, 2021 after 88 days
- Product code: NUH (Stimulator, Nerve, Transcutaneous, Over-The-Counter)
- 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: 8 generations back to K940301 (1994). 17 ancestors in all.
1 later device descends from it; 1 cites it directly.
0 of 19 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K172897: Neck Care Therapy, Model: SYK 509B, Shenzhen Osto Technology Co., Ltd. (2018) Summary page 4.
- K190783: Health Expert Electronic Stimulator (model: AST-300L), Shenzhen Osto Technology Company Limited (2020) Summary page 4.

## Most influential descendants
- K221092: Transcutaneous Electrical Nerve Stimulator Model: ST-304 (2022), 0 descendants of its own

## Indications for use
To be used for temporary relief of pain associated with sore and aching muscles in the shoulder, waist, back of neck, back, arm, and leg, due to strain from exercise or normal household and work activities. - Neck Pad is used on back of neck. - Meridian Pad is used on shoulder, waist, back, arm and leg.

Source page: https://510kreport.com/device/K210756
Methodology: https://510kreport.com/methodology