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)

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

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18737CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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	#217,621 in Office Products ( See Top 100 in Office Products ) #553 in Identification Badges #1,237 in Home Security Systems
Brand	YARONGTECH
Built-In Media	Bag
Cellular Technology	GSM
Customer Reviews	3.9 3.9 out of 5 stars (50)
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
Service Provider	KABA, SAFLOK, MIWA, ONITY
Smart Home Compatibility	Not Smart Home Compatible
UPC	725350790301 725350789701
Unit Count	10.0 Count

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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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18737CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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