2.8 inches ,Fingerprint Capacity: 3,000, ID Card Capacity; 3000 (Optional), Record Capacity: 50,000, Communication: TCP/IP, WiFi, USB-host, Standard Functions: 9 Digit User ID, T9 Input, SMS, DST, Self-Service Query, Automatic Status Switch, Ring bell, Support: ID/Mifare card ( Optional), Power Supply: DC 12V/1.5A, Dimension: 185*137*38.2mm (LxWxT)