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?

Both of them are standard null modem adapters

Will these pass sound so that I may plug in my Bose speakers?

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.

Hi, are both of these the exact same? If not what is the difference?

I ordered a 2 pack for work and they are the same.

Db9 Null Modem Male To Female Slimline Data Transfer Serial

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

10822 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hungary.

Secure transaction

Description

⚡ Effortless serial communication, slimmed down and shielded for pros on the go!

UL 94 V 0 CERTIFIED SAFETY - Built with flame-retardant materials to meet strict safety standards.
PLUG PLAY NULL MODEM CONVERSION - Instantly convert straight cables to null modem wiring—no tech hassle.
EMI SHIELDING FOR SIGNAL INTEGRITY - Fully shielded connectors block interference for flawless data transfer.
SLIMLINE DESIGN FOR PORT PROTECTION - Compact 33x13x2mm profile reduces strain and keeps your ports safe.
REVERSIBLE SCREWS FOR EASY INSTALLATION - Customize your setup with removable, reversible screws—flexibility meets convenience.

The Arnorin DB9 Null Modem Adapter 2-Pack converts standard straight-wired serial cables into null modem configurations with a slim, durable design. Featuring full EMI shielding, reversible screws, and UL 94V-0 flame-retardant connectors, these adapters ensure reliable, interference-free data transfer while protecting your device ports from strain.

Specifications

ASIN	B075XHWVSJ
Best Sellers Rank	#30,409 in Computers ( See Top 100 in Computers ) #82 in Serial Adapters
Brand	Arnorin
Color	2 Pack
Colour	2 Pack
Compatible Devices	Modem
Compatible devices	Modem
Connector Type	DB9
Connector type	DB9
Customer Reviews	4.7 out of 5 stars 1,192 Reviews
External Testing Certification	Não aplicável
Finish	Gold
Input Voltage	9 Volts
Item Dimensions	33 x 13 x 2 millimeters
Item dimensions L x W x H	33 x 13 x 2 millimeters
Manufacturer	Arnorin
Mfr Part Number	KAD9D90001-S-2
Model Number	KAD9D90001-S-2
Number of Items	2
Number of Ports	2
Package Quantity	1
Power Plug Type	No Plug
Smart Home Compatibility	Not Smart Home Compatible
Specific Uses For Product	PC, Laptop
Specific uses for product	PC, Laptop
UPC	613852966235
Unit Count	2.0 Count
Warranty Type	Limited

Reviews

C**W

Simple fix, works perfectly!

This adapter absolutely does the trick. I wasn't getting any signal at all with my setup, but as soon as I put this null modem adapter in, everything started working instantly. It's a very simple plug-and-play solution that just does the job perfectly. Highly recommend if you're dealing with serial communication signal issues! It even comes as a two-pack. I only need one, so I'm not sure what to do with the other now.

25.06.2026

J**E

I'm Happy

Works very well for what I needed. I like the smaller size compared to the others I have that stick out so far.

26.05.2021

G**U

DB9 null modem male

As described.

26.01.2026

C**C

100% Recomendado

La idea era eliminar el cable null modem y funciona bien inicialmente. Lo recomiendo.

9.06.2020

F**O

Null modem

Llegó en tiempo y forma

10.04.2025

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10822 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hungary.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

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Received my product in pristine condition. Great service overall.