What’s difference between mi fare 1k and 4K ? Can i use it to read & write as 1k card ?

the difference is memory. if you use mifare 1k cards,you can buy our MIFARE 1K Cards,it's cheaper. but please note the UID can't change.

Can these be written to as nfc cards?

sorry,no. if you want to compatible with all nfc phone,please choose our ntag215 cards: https://www.amazon.com/dp/B07LFDQBFC

can it be read by NFC smartphone?

can read by some phone.but can't support all phone.

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YARONGTECH 4K RFID Smart Card NFC Chip 13.56MHZ IC Hotel Key Card (Pack of 10)

YARONGTECH 4K RFID Smart Card NFC Chip 13.56MHZ IC Hotel Key Card (Pack of 10)

Product ID: 285117045

Details

Brand
YARONGTECH
Service provider
KABA SAFLOK
Cellular technology
GSM
Product dimensions
8.6L x 5.4W
UPC
725350790301

🆔Unique, factory-set 4 Byte UID

💾4K (1K bytes) read/write memory

📡13.56MHz wireless frequency

€ 33.79

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔐 Unlock professional-grade security with style and ease

PREMIUM BUILD - Durable PVC credit card size, perfect for professional use and easy handling
ROBUST SECURITY - Immutable 4 Byte UID ensures tamper-proof identity every time
CUSTOMIZABLE CANVAS - Blank white surface ready for high-quality sublimation printing on all ISO standard desktop ID printers
SEAMLESS COMPATIBILITY - Works flawlessly with KABA, SAFLOK, MIWA & ONITY locks plus RC522 & PN532 readers
PLUG PLAY CONVENIENCE - Pre-programmed factory default key for instant deployment—no setup hassle

The YARONGTECH MIFARE Classic 4K RFID Smart Card operates at 13.56MHz frequency, featuring 1K bytes of read/write memory and a unique, non-rewritable 4 Byte UID. Sized like a credit card and made from durable PVC, these blank white cards are compatible with major hotel lock systems such as KABA, SAFLOK, MIWA, and ONITY, as well as popular RFID readers like RC522 and PN532. Pre-programmed and ready to print on ISO standard desktop photo ID printers, they offer a secure, customizable, and professional solution for access control.

Specifications

ASIN	B01LYBKM0U
Best Sellers Rank	#105,414 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #131 in Home Alarm Systems
Brand	YARONGTECH
Cellular Technology	GSM
Cellular technology	GSM
Customer Reviews	3.8 out of 5 stars 48 Reviews
Global Trade Identification Number	00725350790301
Item Dimensions L x W	8.6L x 5.4W centimeters
Manufacturer	YARONG
Mfr Part Number	MIFARE Classic® 4K wristbands
Model Number	MIFARE Classic® 4K wristbands
Number of Items	10
Product dimensions	8.6L x 5.4W centimeters
Service Provider	KABA, SAFLOK, MIWA, ONITY
Service provider	KABA, SAFLOK, MIWA, ONITY
UPC	725350790301 725350789701
Unit Count	10 Count
Unit count	10 Count

Reviews

S**R

Good value.

I bought the wrong ones by mistake. I meant to buy the ones tk make amiibos. Still, they're well made and I'm planning to find a new use for them. Great value!

25.07.2020

C**L

Read and write perfect

Cards work well, no problem with our system reading these.

4.06.2025

P**A

the cards do not work and do not match the description

the cards do not work and do not match the description!

16.07.2024

A**R

Works as advertised

Works great Well packaged and shipped fast. Definitely would recommend

18.03.2022

F**D

YARONGTECH 13.56mhz ISO14443A - Standard

✅ **Points positifs** ✅ : - La carte fonctionne parfaitement avec mes appareils RFID 👍 - Facile à utiliser, aucune configuration compliquée ⚙️ - Bonne compatibilité ISO14443A, fiable pour mes projets 🛠️ - Idéal pour les applications nécessitant une lecture rapide et précise 📡 ⚠️ **Points négatifs** ⚠️ : - La qualité d'impression pourrait être améliorée pour des surfaces plus uniformes ✍️ 📝 **Conclusion** 📝 : Ce produit offre une excellente compatibilité ISO14443A et répond efficacement à mes besoins. Sa facilité d’utilisation en fait un choix pratique, même si la finition d’impression pourrait être un peu plus soignée. Un bon investissement pour ceux qui recherchent fiabilité et simplicité.

29.05.2025

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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€ 33.79

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered 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 Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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