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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4K RFID S70 Smart Card Chip 13.56MHZ IC Hotel Key Card (Pack of 10)

Product ID: 39603375

Details

Brand
YARONGTECH
Cellular Technology
GSM
Product Dimensions
3.37"L x
Service Provider
KABA SAFLOK
UPC
725350790301

💳Credit card size, sleek PVC build

💾4K (1K bytes) read/write memory

📡13.56MHz wireless frequency

$25.87

Duties & taxes included

In stock

Sold byAmazon USADelivered 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 USA.

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Description

🔐 Unlock the future of smart access with YARONGTECH’s sleek 4K RFID cards!

BULK READY - Pack of 10 individually OPP bagged cards, ideal for professional hotel or office deployment.
UNIQUE SECURE - Each card comes with a factory-locked 4-byte UID ensuring tamper-proof identity.
PREMIUM DURABILITY - Crafted from sturdy PVC, these credit card-sized keys withstand daily use with style.
CUSTOMIZABLE CANVAS - Blank white surface ready for sublimation printing—perfect for personalized branding.
SEAMLESS ACCESS CONTROL - Operate effortlessly on the ISO14443A standard for universal compatibility.

The YARONGTECH 4K RFID S70 Smart Card Pack offers 10 high-quality, ISO14443A-compliant access cards operating at 13.56MHz. Each card features a secure, factory-set unique ID and 1K bytes of rewritable memory, housed in durable, credit card-sized PVC blanks optimized for sublimation printing. Perfect for hotels and professional environments seeking reliable, customizable, and scalable smart key solutions.

Specifications

ASIN	B01LYBKM0U
Best Sellers Rank	#173,735 in Office Products ( See Top 100 in Office Products ) #425 in Identification Badges #982 in Home Security Systems
Brand	YARONGTECH
Built-In Media	Bag
Cellular Technology	GSM
Customer Reviews	3.9 out of 5 stars 51 Reviews
Global Trade Identification Number	00725350790301
Item Dimensions L x W	3.37"L x 2.13"W
Manufacturer	YARONG
Mfr Part Number	MIFARE Classic® 4K wristbands
Model Number	MIFARE Classic® 4K wristbands
Number of Items	10
Product Dimensions	3.37"L x 2.13"W
Service Provider	KABA, SAFLOK, MIWA, ONITY
Smart Home Compatibility	Not Smart Home Compatible
UPC	725350790301 725350789701
Unit Count	10.0 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

A**R

Works as advertised

Works great Well packaged and shipped fast. Definitely would recommend

18.03.2022

R**.

Waste of money

All 10 of the cards are not writeable. The magic byte is completely inaccessible and a few of the cards are unreadable, even with a high-powered antenna.

8.04.2022

T**F

Five Stars

work as described.

19.12.2017

J**I

Not what I expected

oop

29.04.2020

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

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

C**T

Cartes correctes mais qualité d’impression variable

Ces cartes RFID fonctionnent bien pour la plupart des applications, mais la surface imprimable par sublimation montre parfois des défauts ou une finition inégale. Un produit acceptable, mais perfectible.

7.07.2025

D**O

Fonctionne très bien

Très bien. Fonctionne parfaitement

1.04.2025

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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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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$25.87

Duties & taxes included

In stock

Sold byAmazon USADelivered 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 USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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