A
Anonymous
Mar 25, 2026
Rating: 5/5
Fast shipping
Arrived two days earlier than expected. Great for keeping stock of small replacement parts.
Description
3439-2 Connector [CONN KEYING PLUG OR POLARIZAT]
Reviews
Attributes
| Brand | - |
| Category | 3C Digital Accessories / MP3/MP4 Stands |
| Origin | - |
| Part Number | 3439-2 |
| Manufacturer | Generic OEM |
| Component Type | Connector Keying Plug |
| Function | Polarization and Alignment |
| Material | High-Grade Thermoplastic |
| Color | Black |
| Compatibility | Standard MP3/MP4 Dock Interfaces |
| Package Quantity | 1 Unit |
| Weight | 2 grams |
| Condition | New Original |
6 reviews
A
Anonymous
Mar 25, 2026
Rating: 5/5
Perfect fit for repair jobs
Exactly what I needed to fix a broken dock connector on an older MP4 player. The polarization key aligns perfectly.
A
Anonymous
Mar 22, 2026
Rating: 5/5
Saved my old player
My stand wouldn't hold the device straight anymore. This keying plug fixed the alignment issue immediately.
A
Anonymous
Mar 19, 2026
Rating: 5/5
Genuine part
Looks and feels like an original component. No issues with installation or fitment.
A
Anonymous
Mar 09, 2026
Rating: 4/5
Good quality plastic
The material feels durable and not brittle. Shipping was fast as described. One star off because the packaging was a bit loose.
A
Anonymous
Mar 08, 2026
Rating: 3/5
Works but tight fit
It does the job of polarizing the connection, but it was a very tight squeeze to install. Had to be careful not to crack it.
5 FAQ
Q: What is the return policy if it doesn't fit?
A: We offer a 30-day return window for unused items in their original condition. Please contact our support team to initiate a return.
Q: Is this compatible with all MP3 player stands?
A: This connector is designed for standard interfaces found in many MP3/MP4 docks, but please verify your specific model's pin layout before purchasing.
Q: Does this come with adhesive backing?
A: No, this is a mechanical keying plug intended to snap into the housing or connector block. It does not include adhesive.
Q: Can I buy this in bulk?
A: Yes, we offer bulk pricing for orders over 50 units. Please reach out to our sales department for a custom quote.
Q: Is this part RoHS compliant?
A: Yes, all our electronic components and connectors meet current RoHS compliance standards.
![[Repair] HP HP-MCAT4 F30334S-I / MCAT Board Card](https://www.gosteppe.com/cache/medium/product/211618/legacy-main-d8e11b40a16a4f9e3e0c40a9.webp)
![[Repair] 2939425 Germany Phoenix Contact CM50-PS-120-230AC](https://www.gosteppe.com/cache/medium/product/211974/legacy-main-eeec9c38812def36ce06d011.webp)
![[Direct Mail from Japan] hakubaBA Maintenance Kit: Professional Lens Cleaning Set (3 Pieces) Black KMC-LP23BKTP](https://www.gosteppe.com/cache/medium/product/208933/legacy-main-e11535939efcc8121b432117.webp)
![2318582-8 Connector [WIREMATE 2-PIECE 8MM CONN ASSY,]](https://www.gosteppe.com/cache/medium/product/211045/legacy-main-5ddcca686c4d6d61d2c277f1.webp)
![[Buy One Get One Free] Natural Agarwood, Sandalwood, and Cypress Incense Powder Set with Electric Burner](https://www.gosteppe.com/cache/small/product/270397/legacy-main-04181167165316608773b986.webp)
