---
product_id: 50258218
title: "DB9 null modem male to female slimline data transfer serial port adapter 2 Pack"
brand: "arnorin"
price: "$27"
currency: NZD
in_stock: true
reviews_count: 13
category: "Arnorin"
url: https://www.desertcart.nz/products/50258218-db9-null-modem-male-to-female-slimline-data-transfer-serial
store_origin: NZ
region: New Zealand
---

# Null modem wiring conversion UL 94V-0 flame-retardant insulator Slimline design reduces port strain DB9 null modem male to female slimline data transfer serial port adapter 2 Pack

**Brand:** arnorin
**Price:** $27
**Availability:** ✅ In Stock

## Summary

> 🔌 Upgrade your legacy gear with sleek, safe, and savvy serial adapters!

## Quick Answers

- **What is this?** DB9 null modem male to female slimline data transfer serial port adapter 2 Pack by arnorin
- **How much does it cost?** $27 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/50258218-db9-null-modem-male-to-female-slimline-data-transfer-serial)

## Best For

- arnorin enthusiasts

## Why This Product

- Trusted arnorin brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted & Proven:** Top 10 best seller with 4.7-star rating from over 1,000 users—join the savvy pros.
- • **Safety-First Build:** UL 94V-0 rated insulator ensures flame resistance for peace of mind.
- • **Versatile & User-Friendly:** Removable, reversible screws for easy installation and secure fit.
- • **Slim & Sleek Port Protector:** Slimline profile minimizes leverage strain, extending your device’s port life.
- • **Effortless Cable Transformation:** Convert standard cables to null modem in seconds—no tech jargon needed.

## Overview

This 2-pack of DB9 null modem male-to-female slimline adapters converts standard straight-wired serial cables into null modem configurations effortlessly. Designed with a slim profile to reduce port strain and UL 94V-0 flame-retardant connectors, these adapters ensure durability and safety. Removable and reversible screws add installation flexibility. Highly rated and a top seller, they’re the perfect solution for professionals needing reliable serial data transfer in legacy systems.

## Description

Convert your existing straight wired cables to null modem or reverser (transmit & receive) cables with these handy, inexpensive adapters. Simply plug these adapters onto the end of a cable and you're done !

Review: Works to convert between crossover and straight through - Because serial is not exactly current technology it can be difficult to tell both what type of cable you need and what type of cable you are buying. Sellers don't know the difference and even if things are properly labeled the terminology and jargon might as well be hieroglyphics at this point. After purchasing the wrong ones, and buying the "right ones" but receiving completely different mislabeled cables, this item allowed me to get my DB9 - DB25 Epson Thermal Printers working. I still don't know exactly which cables I purchased or which I needed, but these fixed the issue regardless.
Review: Exactly as stated - These adapters were solidly built and worked as advertised. Fast delivery and excellent packaging.

## Features

- Converts standard, straight wired cables to null modem wiring
- Null modem configuration with pin 9 open
- Slimline design reduces leverage strain on computer ports
- UL grade 94V-0 connector insulator satisfies flammability requirements
- Screws are removable and reversible

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B075XHWVSJ |
| Best Sellers Rank | #9 in Serial Adapters |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,005) |
| Date First Available | September 25, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.704 ounces |
| Item model number | KAD9D90001-S-2 |
| Manufacturer | KINGDEE INC |
| Product Dimensions | 1.3 x 0.5 x 0.07 inches |

## Product Details

- **Color:** 2 Pack
- **Compatible Devices:** Modem
- **Connector Type:** DB9
- **Item dimensions L x W x H:** 1.3 x 0.5 x 0.07 inches
- **Specific Uses For Product:** PC, Laptop

## Images

![DB9 null modem male to female slimline data transfer serial port adapter 2 Pack - Image 1](https://m.media-amazon.com/images/I/51FwpT4q21L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What i think i am seeing in the picture is two different converters.  is one a straight through gender changer & the other a null modem configuration?**
A: Both of them are standard null modem adapters

**Q: Will these pass sound so that I may plug in my Bose speakers?**
A: not sure your application, this is an RS232 signal swap adapter.
Here is pinout: pin-1 goes to pin-4, 
pin-2 to pin-3, 
pin-5 to pin-5, 
pin-7 to pin-8, and 
pins-6&9 are not connected.

**Q: do I have to use two connectors on each cable?**
A: No on one on each cable

**Q: Hi, are both of these the exact same? If not what is the difference?**
A: I ordered a 2 pack for work and they are the same.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works to convert between crossover and straight through
*by V***N on August 4, 2025*

Because serial is not exactly current technology it can be difficult to tell both what type of cable you need and what type of cable you are buying. Sellers don't know the difference and even if things are properly labeled the terminology and jargon might as well be hieroglyphics at this point. After purchasing the wrong ones, and buying the "right ones" but receiving completely different mislabeled cables, this item allowed me to get my DB9 - DB25 Epson Thermal Printers working. I still don't know exactly which cables I purchased or which I needed, but these fixed the issue regardless.

### ⭐⭐⭐⭐⭐ Exactly as stated
*by T***M on February 25, 2025*

These adapters were solidly built and worked as advertised. Fast delivery and excellent packaging.

### ⭐⭐⭐⭐⭐ Compact and secure null modem adapter with solid mechanical design
*by R***O on February 17, 2026*

I purchased these for connecting legacy equipment that requires a null modem configuration, and they worked exactly as expected. The slimline form factor is helpful in tight setups where multiple DB9 connectors sit close together. Fit is solid once connected, and there’s no noticeable play in the connection. One detail I especially appreciate is the mechanical design of the screw posts. Each jack screw is essentially a double-sided threaded post — one end secures the adapter to the equipment’s serial port, and the other end has internal threading to accept the thumbscrews from the connected cable or another adapter. This allows the connection to be mechanically fastened on both sides, which adds stability and prevents accidental loosening in lab, rack, or field environments. Signal transfer has been stable with no communication issues during use. For serial troubleshooting or legacy device connections, they’ve been reliable.

## Frequently Bought Together

- DB9 null modem male to female slimline data transfer serial port adapter 2 Pack
- Arnorin DB9 Null Modem Female to Female Slimline Data Transfer Serial Port Adapter 2 Pack
- Arnorin DB9 Null Modem Adapter Male to Male Slimline Data Transfer Serial Port Adapter 2 Pack

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-07*