Upgrade your access control system with MIFARE Classic 4K BLUE S70 Key Fobs (100 pack)—a premium contactless credential solution designed for high-capacity, secure, and scalable applications. Powered by advanced 13.56 MHz RFID technology, these fobs deliver fast read performance and enhanced data handling through 4KB memory architecture, making them ideal for multi-application environments such as corporate campuses, healthcare facilities, education institutions, and smart building systems. Engineered for durability with a rugged ABS shell and compact keychain design, S70 key fobs provide long-lasting, maintenance-free operation while supporting complex encoding and secure authentication. Whether you're deploying access control, cashless payment, or integrated ID systems, these fobs offer a reliable, future-ready credential solution trusted by security professionals.

The MIFARE Classic 4K BLUE S70 Key Fobs (100 Pack) are high-performance, contactless credentials engineered for advanced access control and multi-application environments. Built on 13.56 MHz RFID technology (ISO/IEC 14443 Type A), these fobs deliver fast, secure communication with compatible readers while supporting a wide range of systems including access control, time & attendance, cashless vending, and campus ID applications.

Featuring 4KB EEPROM memory, the S70 chip is structured into multiple sectors and blocks, allowing for complex data storage, segmentation, and secure encoding—ideal for organizations that require more than basic credential functionality. Unlike lower-capacity 1K options, the 4K S70 provides expanded flexibility for multi-use credentials, enabling integration across multiple systems using a single fob.

Encased in a durable ABS housing, these gray key fobs are designed for everyday use on keyrings, offering long-term reliability in high-traffic environments such as offices, campuses, residential communities, gyms, and parking facilities. With contactless operation, they require no battery and minimal maintenance, ensuring consistent performance over time.

Industry Standard MIFARE® Card (14443 Type A/B), S70. BLUE Fob.