TransitionTM Multi-Technology Readers 500 Series, 520 Series and 525 Series are GE's multi-technology readers that support multiple authentication technologies, including GE and HID 125 kHz proximity cards, HID Corporate 1000 proximity cards, MIFARE (ISO 14443A) 13.56 MHz contactless smart card technology, MIFARE/DESFire and Vicinity (ISO 15693) as well as HID iCLASS technology.