We mainly adopt the Mifare Classic 1K with 1 Kbytes Eeprom read/write memory and Mifare Classic 4K with 4 Kbytes of EEPROM read/write memory. They are compatible with existing MIFARE infrastructures. Operating in accordance with ISO 14443A, Mifare 4K functions at a distance of up to 10 cm with true anti-collision properties and without the need for a battery. The Mifare classic family is the pioneer and front runner in contactless smart card ICs operating in the 13.56 MHz frequency range with read/write capability We also make the I-code SL2, Mifare Ultralight, Ultralight C, Mifare Desfire D21D41D81, ISSI24C16, ISSI24C02, ISSI24C64, Mifare Plus 2k4k, EM4200, EM4450, EM4305 etc. 200pcs per box , 2000pcs per carton. Each carton gross 27.5kg.