Proximity RFID ID card is divided into thick card Clamshell, passive Clamshell size 5.4 * 8.6 * 1mm, thick card size 5.4 * 8.6 * 1.5-3mm, reading distance from 1 to 20CM, according to the different reading can also be the largest 1 meter.EM ID card, mainly using the Swiss EM or Taiwan's TK4100,TK4102 series IC chip + coil + card base package.Tk4001 Induction ID thick card: TK4100 COBFeatures: ordinary type card, moderate thickness, with ID number, can be put inside the wallet, and a portable hole. Is the most economical RF IC card.
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