... EM thin / thick card:EM chip, 125KHz 64bit 2.With printed code, color print in double side 3.No need battery EM ... -01A Thin CardThickness 0.8mm, EM chip,125K RO (Read Only) ... Read Only) chipEM-01C Thick CardThickness 1.8mm, EM chip,Special card for middle distance card reader1. ... tip of 125khz frequency contactless, no need for battery;3.Up to 56-digit wiegand format;4 ...