Can you tell me its range? I want to detect my cat's microchip from several inches away, through his skin and fur.

After setting the module to max range, the best I can get is a half inch range. Also, animal microchips operate on a different frequency (~130kHz) than standard NFC 13.56MHz).

Does the rfid-rc522 come with the header pins already soldered?

No. It comes with 2 types of pins; straight and L shaped so you can fit it to any project. But you’ll have to solder the ones that fit to the board

what type of cards should i buy if i want more

the question you ask really makes me stop and think. I believe you are asking about the operating frequency of the card. It needs to have an Operating Frequency 13.56MHz. Many of the ones I see offered from Amazon state that they operate at 125 KHz. I would not buy those. I would buy one that specifies the 13.56 MHz frequency. I prefer the dog tag type over the card type, but that would just be personal preference. I hope my answer is helpful.

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HiLetgo RFID Kit - Mifare RC522 RF IC Card Sensor Module + S50 Blank Card + Key Ring for Arduino Raspberry Pi

Product ID: 28355008

Details

Brand
HiLetgo
CPU Model
Tegra
Connectivity Technology
LAN
Included Components
RFID Kit
Model Name
HiLetgo RFID

📡13.56MHz high-frequency RFID

🔋Ultra-low power sleep mode <80µA

🔗SPI interface for seamless CPU integration

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Description

🔐 Unlock innovation with the ultimate RFID toolkit—because your projects deserve smart security.

ROBUST RELIABLE - Operates flawlessly between -20°C to 80°C, built to withstand diverse environments and demanding use cases.
COMPLETE STARTER KIT - Includes RFID module, blank S50 card, and key ring for immediate testing and development—no extra purchases needed.
EFFORTLESS INTEGRATION - Plug-and-play SPI interface ensures smooth connection with Arduino & Raspberry Pi for rapid prototyping.
POWER SAVVY PERFORMANCE - Ultra-low sleep current (<80µA) maximizes energy efficiency for long-term projects without battery drain.
VERSATILE COMPATIBILITY - Supports a wide range of MIFARE cards including S50, S70, Ultralight & DESFire for flexible application design.

The HiLetgo RFID Kit features the Philips MFRC522 chip enabling 13.56MHz contactless communication with MIFARE cards. Designed for low power consumption and stable SPI communication, it supports multiple card types and operates reliably across a wide temperature range. Ideal for Arduino and Raspberry Pi developers, this kit includes everything needed to prototype secure, high-speed RFID applications.

Specifications

ASIN	B01CSTW0IA
Best Sellers Rank	#561 in Single Board Computers (Computers & Accessories)
Brand	HiLetgo
Built-In Media	RFID Kit
CPU Model	Tegra
Compatible Devices	Arduino, Raspberry Pi
Connectivity Technology	LAN
Customer Reviews	4.5 4.5 out of 5 stars (211)
Manufacturer	HiLetgo
Mfr Part Number	3-01-0490-A
Model Name	HiLetgo RFID
Operating System	Linux
Processor Brand	NVIDIA
Processor Count	1
Total Usb Ports	1
Wireless Compability	Radio Frequency

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€ 15.49

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In stock

Sold byAmazon FranceDelivered 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 France.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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