... Colors: Available Red, black, yellow, blue, grey, green... IC available at 125KHz nominal:TK4100, EM4100, EM4102, EM4450,NXP Hiatg1, Hitag2, HitagS256 ... , HitagS2048, Atmel temic 5567 IC available at 13.56MHz nominal:NXP Mifare1 S50, Mifare1 S70, Desfire MF3ICD41 ... , etc Oem welcome. T5557 RFID keychain in blue color LK-008