RFID Key Tag/TK4100 keytag/EM4305 key tag Size:37*30.3*8.2mm Blue/Grey,other color ... . -25 ~ + 50 degreeIC available at 125KHz nominalTK4100, EM4100, EM4102, EM4450,NXP Hiatg1, Hitag2, HitagS256, HitagS2048,Atmel temic 5567IC available at 13 ... mim256, JWL872, TI256, TI2048,INSIDE picopass 2KS 125Khz RFID Key Tag/TK4100 keytag/EM key ...