RFID Mifare Keychain 125KHZ

The RFID Mifare Keychain 125kHz is a highly practical RFID-enabled proximity fob designed to offer a simple, secure, and contactless method of identification and access control. Each keychain contains an embedded RFID chip with a unique ID (UID) that can be read wirelessly by any compatible 125kHz RFID reader when brought within a few centimeters of the device—no physical contact or battery required. This passive technology works by using the energy emitted from the reader itself to power the chip inside the keychain, making it maintenance-free and capable of lasting for many years with unlimited use. The keychain is housed in a durable PVC casing with a laminated finish that protects the internal components from dust, moisture, and minor impacts. Its compact size and attached key ring make it easy to carry on a standard keychain, belt clip, or lanyard. The fob supports multiple RFID IC types, including popular low-frequency (LF) chips like EM4100, EM4102, and GK4001, making it compatible with the most common access control systems worldwide. The keychain can be customized with silkscreen logos, laser-marked logos, jet-printed serial numbers, or laser-engraved identification numbers, making it ideal for branded corporate use, hotels, gyms, and membership clubs. It is commonly used in office access control, residential door entry systems, time and attendance tracking, hotel room keys, parking facilities, loyalty programs, and cashless payment systems.

Specifications

• Product Type: RFID Proximity Keychain / Key Fob
• Operating Frequency: 125 kHz (Low Frequency)
• Supported LF Chips: EM4100, EM4102, GK4001 (unique ID types)
• Supported HF Chips (Optional variants): Mifare Classic 1K/4K, Mifare Ultralight, Mifare DESFire, ISO 14443A, ISO 15693, ISO 18000-3, I-Code SLI
• Read Distance: 2 – 10 cm (depending on reader)
• Memory: Typically 64-bit read-only UID (for EM4100) or programmable (for certain chips)
• Material: PVC (Polyvinyl Chloride)
• Finish: Laminated
• Customization Options:
• Silkscreen logo printing
• Laser-marked logo
• Jet-printed serial number
• Laser-engraved serial number
• Data Retention: 10+ years (typical)
• Read/Write Cycles: 100,000+ (for rewritable variants)
• Operating Temperature: -20°C to +70°C
• Storage Temperature: -40°C to +85°C
• Waterproof: Yes (PVC laminated, splash-resistant)
• Power Source: Passive (No battery required)
• Attachment: Key ring hole for easy carrying
• Form Factor: Compact keychain shape

Applications

• Used in access control systems for offices, homes, and residential buildings.
• Essential in time and attendance tracking for employees.
• Employed in hotel door locks as electronic room keys.
• Used in gym and fitness center memberships for entry and tracking.
• Applied in parking lot access for residents and authorized personnel.
• Common in university and school campus access.
• Used in club and SPA membership management.
• Found in cashless payment systems for small transactions.
• Employed in library card systems for book checkouts.
• Used in public transportation for ticketing and fare collection.
• Applied in event tickets and festival access.
• Common in loyalty and rewards programs in retail stores.
• Used in staff identification in hospitals, factories, and government buildings.
• Found in cashless vending machines and office cafeterias.
• Employed in IT security for server room access.
• Used in promotional campaigns with branded keychains.
• Applied in hotel key replacement systems.
• Common in visitor management systems.
• Used in RFID-based tool tracking in workshops and factories.
• Found in smart home systems for user authentication.