do I need to buy a Micro SD separately?

No. This model doesn't have a Micro SD card slot.

Came with no instructions. Are there online instructions available?

It's a rubber ducky. There are tutorials online (both in text format and in video format AKA YouTube).

Does this need Arduino drivers just on the programming computer, or also on the target machine in order to function as an HID and execute kenystrokes?

You will need the Arduino IDE to program that BadUSB rubber ducky.... But you don't need it for the "victim PC"

How can I open the metal case (without destroying it) to get to the atmega32u4 inside?

The cover for the PCB is pressed into a shell. It's either a rather tight fit, or glued. You may be able to pull it out with pliers if you're ok with damaging the contacts and possibly cracking the PCB. Ideally there is foam lining the top, so dremeling it with some time would most likely work. Sorry for the long winded and not quiet conclusive answer.

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HiLetgo BadUsb Beetle Bad USB Microcontroller ATMEGA32U4 Development Board Virtual Keyboard for Arduino Leonardo R3 DC 5V 16MHz

HiLetgo BadUsb Beetle Bad USB Microcontroller ATMEGA32U4 Development Board Virtual Keyboard for Arduino Leonardo R3 DC 5V 16MHz

Product ID: 161133891

Details

Brand
HiLetgo
Color
White
Compatible Devices
Computers
Connectivity Technology
Micro USB
Included Components
Arduino
Keyboard Description
Virtual

⚡16 MHz clock speed

🔌5V operating voltage

🔢10 digital I/O pins

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120 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
HiLetgo
Color
White
Compatible Devices
Computers

Description

🚀 Unlock your inner hacker with the stealthy BadUSB Beetle!

ROBUST I O FLEXIBILITY - 10 digital pins and 5 analog inputs give you the freedom to connect a wide range of sensors and actuators.
COMPACT DISCREET DESIGN - Ultra-lightweight and metal-encased for durability and stealth in your prototyping arsenal.
VERSATILE 5 V OPERATING VOLTAGE - Seamlessly integrates with standard USB power sources for hassle-free development.
POWER PACKED 16 M HZ PERFORMANCE - Experience lightning-fast processing with the ATmega32u4 core, perfect for complex Arduino projects.
ARDUINO COMPATIBLE READY TO CODE - Preloaded with demo scripts and fully programmable in C++ to unlock endless creative possibilities.

The HiLetgo BadUSB Beetle is a compact ATmega32u4-based development board running at 16 MHz with 5V operation. It features 10 digital I/O pins, 5 analog inputs, and multiple communication interfaces, making it ideal for Arduino Leonardo-compatible projects. Its solid metal build and preloaded demo script offer a reliable, discreet platform for advanced microcontroller applications.

Specifications

ASIN	B07W5K9YHP
Additional Features	Backlit
Antenna Location	Gaming
Best Sellers Rank	#494 in Single Board Computers (Computers & Accessories)
Brand	HiLetgo
Built-In Media	Arduino
Color	White
Compatible Devices	Computers, Laptops
Connectivity Technology	Micro USB
Customer Reviews	4.2 out of 5 stars 178 Reviews
Enclosure Material	Acrylonitrile Butadiene Styrene
Hand Orientation	Ambidextrous
Keyboard Description	Virtual
Keyboard Layout	QWERTY
Manufacturer	HiLetgo
Mfr Part Number	3-01-1521
Model Name	Bad USB Beetle USB ATMEGA32U4 Development Board for Arduino Leonardo R
Model Number	3-01-1521
Number of Keys	5
Power Source	DC Power Supply
Processor Count	1
Recommended Uses For Product	Gaming
Special Feature	Backlit
Style Name	Contemporary
Theme	Modern
Unit Count	1.0 Count
Water Resistance Level	Not Water Resistant

Reviews

L**S

5.01.2026

J**D

20.04.2026

J**S

25.04.2025

J**A

29.10.2025

M**.

19.06.2024

A**I

30.09.2025

M**F

2.01.2024

M**P

17.07.2024

C**N

20.11.2025

H**E

21.01.2021

M**G

6.06.2024

W**N

19.06.2021

A**O

16.01.2026

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120 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered 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 Poland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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