The S990 is a standalone RFID Time Attendance and Access Control system supporting 30,000 users and 100,000 transactions. It features an 800MHz 32-bit processor with fast identification under 1 second and high accuracy. The device includes a 2.8” TFT display, keypad, and multiple communication options like TCP/IP and RS232/485. It supports advanced access control features such as anti-passback, fire alarm, and relay outputs for various locks. Compatible with third-party HRMS and payroll software, it offers flexible integration and optional Wi-Fi/GPRS connectivity.