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.Customs & duties included in the price

Help Track order

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172 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered 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 Romania.

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Description

⚡ Effortless serial data flow, slimmed down for your sleek setup.

UL 94 V 0 CERTIFIED SAFETY - Built with flame-retardant materials for peace of mind in professional environments.
REVERSIBLE REMOVABLE SCREWS - Customize your setup with screws that adapt to your hardware needs.
SLIMLINE SPACE SAVING DESIGN - Compact 33x13x2mm profile minimizes leverage strain on your precious ports.
PLUG PLAY NULL MODEM CONVERSION - Instantly convert straight cables to null modem wiring—no fuss, no downtime.
EMI SHIELDING FOR SIGNAL INTEGRITY - Fully shielded connectors ensure clean, interference-free data transfer.

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, UL 94V-0 flame-retardant connectors, and reversible screws, these compact adapters ensure reliable, interference-free data transfer while reducing strain on computer ports. Ideal for professionals needing quick, plug-and-play serial communication fixes.

Specifications

ASIN	B075XHWVSJ
Best Sellers Rank	#44,469 in Computers ( See Top 100 in Computers ) #111 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 1,196 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
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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172 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered 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 Romania.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.