... chips are available proximity thin card for hotel card key system FeaturesLF/ HF/UHF operational frequency chips are ... : 85.6x54x0.84mmColor: white, custom made printingOperational Frequency: 125KHz/13.56MHz/915MHzAvailable chip:125 KHzTK4100, EM4100, EM4102, EM4450, T5577 ... , Hitag1, Hitag2, HitagS256,13.56MHzMifare 1 S50, Mifare 1 S70, Mifare Ultralight, Mifare ...