Why does the product photo have a jumper across txd and rxd?

The jumper between TX and RX is mainly used for testing. Short TX, RX means you will receive any data you send. When you program or debug, you can quickly confirm if the TTL adapter is damaged. It saves you time and quickly locates faults.

What is the maximum baud rate of this device?

Build-in FTDI FT232RL Chip, max speed is to 3Mb/s . After testing, we found that data can be transmitted stably below 115200 baud rate.

Does this work with the arduino ide to upload sketches to the arduino pro mini?

yes ,it work with arduino ide to upload sketches to pro mini.

I want to confirm, 5v from the usb side is output to vcc as 5v or converted to 3.3v /1.8v by jumper and sets ttl interface level correct?

Hi, I just checked this on mine with a DMM to verify. Your assumption is correct: the jumper will alter the VCC to 5/3.3/1.8V.

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DSD TECH SH-U09C2 USB to TTL Adapter Built-in FTDI FT232RL IC for Debugging and Programming

DSD TECH SH-U09C2 USB to TTL Adapter Built-in FTDI FT232RL IC for Debugging and Programming

Product ID: 295161520

Details

Colour
Transparent
Compatible Devices
GPS
Connector Type
USB
Item dimensions L x W x H
38 x 10 x 4

⚡3Mbps max data speed

🔄Switchable 1.8V/3.3V/5V logic levels

🛡️Protective transparent casing

€ 42.35

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Description

🔌 Power your projects with precision and protection!

RELIABLE SUPPORT WARRANTY - Backed by a 12-month warranty and responsive 24-hour customer support—your tech safety net.
ROBUST FTDI FT 232 RL CHIPSET - Powered by the industry-trusted FTDI FT232RL IC ensuring rock-solid, driver-free connectivity across Windows, Mac, and Linux.
STATIC SHORT CIRCUIT SHIELDING - Transparent protective case guards your adapter from static interference and accidental shorts—work confidently anywhere.
VERSATILE DEBUGGING PROGRAMMING - Perfect for flashing firmware, unbricking routers, programming ESP8266, and interfacing with GPS or set-top boxes.
UNIVERSAL LOGIC VOLTAGE FLEXIBILITY - Seamlessly toggle between 1.8V, 3.3V, and 5V TTL levels for ultimate device compatibility.

The DSD TECH SH-U09C2 USB to TTL Adapter features the original FTDI FT232RL IC, supporting switchable 1.8V, 3.3V, and 5V logic levels for broad device compatibility. Encased in a transparent protective shell, it prevents static and short circuits, making it ideal for programmers and hardware engineers. Compatible with Windows, Mac, and Linux, it supports high-speed data transfer up to 3Mbps and offers versatile applications including firmware flashing, debugging, and programming. Comes with a 12-month warranty and dedicated customer support.

Specifications

ASIN	B07TXVRQ7V
Best Sellers Rank	#13,797 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #39 in Serial Adapters
Brand Name	DSD TECH
Colour	Transparent
Compatible Devices	GPS
Connector Type	USB
Country of Origin	USA
Customer Reviews	4.8 4.8 out of 5 stars (902)
Input Voltage	5 Volts
Item Dimensions	38 x 10 x 4 Millimeters
Item Package Quantity	1
Item Weight Unit of Measure	0.2 Ounces
Manufacturer	DSD TECH
Manufacturer Part Number	SH-U09C2
Model Number	SH-U09C2
Number of Items	1
Number of Ports	1
Power Plug Type	No Plug
Product Finish Type	Plastic
Specific Uses For Product	Programming, Debugging, EEPROM, Router, ESP8266 Module, GPS Modules, Firmware on Hard Drive, Transmitter, Set Top Box
UPC	734678383287
Unit Count	1.0 Count
Warranty Description	no warranty available
Warranty Type	12 months warranty.if

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€ 42.35

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered 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 Greece.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Good experience, but the tracking updates could be better.

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