125 kHz RFID access chip (EM-Marine), with key ring, grey.

Description 125 kHz RFID access chip (EM-Marine). 125 kHz RFID chips are contactless radio-frequency identification access chips commonly used in security systems, such as door access control, transportation systems, libraries, or workplace attendance tracking. Product Description: Frequency:125 kHz (LF – Low Frequency) Chip:China-manufactured clonable chip: TK5200 – reprogrammable clone chip (TK4100 compatible). Numbering: engraved, sequential numbering. Material:PVC plastic Color:Grey Tööraadius:Up to 10 cm (depending on the reader) Features and advantages: Passive chip – does not require an internal power source (no battery). Clonable (with T5577) – can be programmed in different formats. Read by chip ID – uses UID (Unique ID) only for identification. Durable and water-resistant – suitable for everyday use. Universal compatibility – works with many 125 kHz readers. Low-cost and widely used in mass production. Typical applications: Door access control systems. Time and attendance systems. Apartment building intercom systems. Parking systems. Animal and asset identification. Notes: TK4100 and EM4100 are read-only – the UID is programmed at the factory and cannot be changed. T5577 allows the card to be reprogrammed multiple times, making it useful for cloning and system testing. These chips are not compatible with 13.56 MHz (NFC) systems!