This is 125Khz Access Proximity RFID Card that can be used for 125Khz RFID Reader to detect the radio frequencies 125Khz operating frequency. Pre-programmed with unique ID number. Compatible with all ID door access devices or ID reader. Contactless transmission of data and supply energy. Note: Users need to programme the 10 digits ID number which has print on the card, for example, 0008198223.