... us.Benefits:Color TFT screen with GUI Interface for ease of use.TCP/IP, RS485Battery: USB charge-- powered two ways to ... 000· Sensor: Optical Sensor· Communications: RS485, TCP/IP, USB-host,· Standard Functions : ID card function , Scheduled-bell, Self-Service Query,· Optional ... Functions: Mifare Card function, 9 digit user ID, standby for 3-6 hours. · Display: 3 inches TFT ...