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Keyestudio Leonardo R3

Marsoni M251S
Sale price$33.00
Pay 4 payments of $8.25 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Keyestudio Leonardo R3keyestudio Leonardo is a microcontroller board based on the ATmega32u4 (datasheet). It is an easy to use open source hardware. It has 20 digital input output pins (of which 7 can be used as PWM outputs), 12 analog inputs, a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.1 ★★★★★
Based on 963 reviews
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Product Reviews
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Verified Purchase
Howard
Los Angeles, US
★★★★★ 5
Good wallet
Color: Carhartt Brown (Trifold)
Great wallet so far
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
A
Verified Purchase
A. Parker
Port Orchard, US
★★★★★ 5
Can't Copy Carhartt
Color: Carhartt Brown (Bifold), Color: Carhartt Brown (Bifold)
I just received it but I like it so far. Replaced a 12-year-old Carhartt wallet that didn't have RFID protection. Mink oil turns it into a pleasing chestnut, FYSA
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
A
Verified Purchase
Amazon Customer
Los Angeles, US
★★★★★ 5
My two cent review
Color: Carhartt Brown (Trifold)
Great quality material and pleasing to the touch. Perfect size for front or back pocket. Nice style and neutral color makes it versatile no matter your style of choice.
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Reviewed in the United States on April 14, 2026
M
Verified Purchase
Mark A. Ordal
Whiting, US
★★★★★ 4
Overall a nice wallet
Color: Carhartt Brown (Trifold)
The card slots are a little tight so removing cards can be a hassle. On the other hand, cards won’t fall out if you invert the wallet. I expect the card slots to loosen up with prolonged use. The wallet is great in all other respects.
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Reviewed in the United States on December 12, 2025
P
Verified Purchase
Phant
Chelsea, US
★★★★★ 5
Worth
Color: Silver Men Watch/Arabic Numerals Dial
I see YouTubers putting this brand down. I recently bought some cheap watches and can see the difference. This watch is excellent for the price. I have had it for some time now and band has scuffs, there is no discoloration. It's solid stainless. It keeps good time, it's simple and beautiful. Would buy it again.
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Reviewed in the United States on March 23, 2025

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