... or poor, within 0.6 second.. Built in embedded standalone ARM9 module with big capacity FLASH, it ... CDMA/WIFIAlarm clockEmbedded alarm clockExternal functionsConnect Electronic lock(Access Control), Electronic bellCommunicationsRS232 or RS485, TCP/IP, USB ... and so on(As your request)Working modeTime & attendance, standalone, can working persistentlyTime & Attendance modeFingerprint, password, card, ...