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

Product ID: 253816835

Details

Colour
Multicoloured
Compatible devices
Hard Drive
Connector type
USB
Item dimensions L x W x H
38 x 10 x 4

⚡3Mbps max speed

🔄Supports 1.8V/3.3V/5V logic levels

🛡️Protective static-shielding case

€ 22.85

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your projects with precision and protection!

TRI VOLTAGE LOGIC MASTERY - Seamlessly switch between 1.8V, 3.3V, and 5V TTL levels with a simple jumper—future-proof your projects.
BUILT IN FTDI FT 232 RL CHIP - Experience rock-solid, original FTDI chipset reliability trusted by pros worldwide.
CROSS PLATFORM COMPATIBILITY - Plug & play on Windows, Mac, and Linux—no driver drama, just instant connectivity.
STATIC SHORT CIRCUIT SHIELD - Transparent protective casing guards your adapter from static shocks and accidental shorts—work worry-free.
1 YEAR WARRANTY RAPID SUPPORT - Backed by DSD TECH’s 12-month warranty and 24-hour responsive customer care—your peace of mind, guaranteed.

The DSD TECH SH-U09C2 USB to TTL UART adapter features the original FTDI FT232RL chip, supporting versatile 1.8V, 3.3V, and 5V logic levels. Encased in a transparent protective shell to prevent static interference and shorts, it offers up to 3Mbps data transfer speed and broad OS compatibility including Windows, Mac, and Linux. Ideal for programmers and hardware engineers, it comes with a 1-year warranty and responsive customer support.

Specifications

ASIN	B07TXVRQ7V
Best Sellers Rank	#11,521 in Computers ( See Top 100 in Computers ) #21 in Serial Adapters
Brand	DSD TECH
Color	Multicoloured
Compatible Devices	Hard Drive, Laptop
Connector Type	USB
Country of Origin	China
Current Rating	1 Amps
Customer Reviews	4.8 4.8 out of 5 stars (901)
Finish	Plastic
Input Voltage	5 Volts
Item Dimensions	38 x 10 x 4 millimeters
Item Weight	0.2 Ounces
Manufacturer	DSD TECH
Mfr Part Number	SH-U09C2
Model Number	SH-U09C2
Number of Items	1
Number of Ports	1
Package Quantity	1
Power Plug Type	No Plug
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 Count
Warranty Description	1-year warranty
Warranty Type	Limited

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 22.85

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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Smooth transaction and product arrived in perfect condition.

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