ZKTeco K40 is a 2.8-inch TFT screen Time Attendance & Simple Access Control Terminal. It has interfaces for third party electric lock and exit button. TCP/IP and USB Host make data management extremely easy. Most importantly, the built-in backup battery can eliminate the trouble of power-failure. With elegant appearance and reliable quality, you can get the best from it. Special Feature of TCP/IP, USB-host ,Built-in battery,Simple access control or external bell, SSR report in excel forms. Specification Fingerprint Capacity 3000 ID Card Capacity 3000 Record Capacity 100000 Display 2.8-Inch TFT Screen Communication TCP/IP, USB Host Standard Function Work Code, SMS, DST, Self-Service Query, Automatic Status Switch, Scheduled-Bell, T9 Input, 9 Digit User ID, Built-In Battery, Simple Access Control Or External Bell Optional Function ID/Mifare Software ZKTime5.0 Power Supply DC 12V 1.5A Verification Speed <0.5 Sec. Operating Temp 0°C-45°C Operating Humidity 20%-80% Dimension 184*136*37.6(Length*Width*Thickness) 01 year warranty