ESSL Identix K-20 New Coloured Biometric Time Attendance Machine with Door Access (RFID Card + Finger Print) Include Battery Backup Fingerprint, face, RFID and password 4 type verification mode. High-speed identification less than 1 second. TCP/IP Port for Internet connection. Access Port available to control one lock and exit button. Optional 5V 1900mAH UPS, standby up to 3 hours