Fingerprint Capacity 500(Standard) ID Card Capacity 500 User 500 Record Capacity 50,000 Display 2.8-inch TFT Screen Communication TCP/IP, USB-Host Standard Functions Work Code,Short Message, DST, Scheduled-bell, Self-Service Query, Automatic Status Switch,Backup Battery ,T9 Input, 9 digit user ID Optional Functions External bell, MiFare Card, WIFI, 4G, 3G, Bluetooth Power Supply DC 12V 1.5A