The Hikvision DS-K2801 ACS network controller is designed for single-door control, including remote control. The board is enclosed in a metal case, based on a 32-bit high-speed processor. The device is equipped with a built-in clock. Supports 2 readers, the interface is Wiegand (W26/W34). Network interfaces are TCP/IP (encryption support to enhance information security). Memory capacity: 16 MB — 10,000 cards, 50,000 events, maximum of 20 digits in the card number. Alarm input/output (3/2): Door Magnetic×1, Door Switch×1, Case Input×1; outputs — Switch Relay×1, Alarm Relay×1. It supports third-party cards and readers, various types of cards (blacklist, patrol, guest, coercion, supercard, etc.), two modes of operation (offline/online), time synchronization via NTP. The LED indicator shows the power status, connection status, and alarm events. Power supply is DC 12 V /1A, consumption is up to 3.5 W without load, dimensions are 285×237×69 mm. Operating conditions: temperatures -20 °C... +65 °C, humidity 10-90% (non-condensing). Certification — CE, FCC. The warranty is 3 years.