This weatherproof proximity card reader is a perfect access control device for doors in factories, office buildings, and other sensitive areas. Maximum distance is approx. 18cm (7 inches), depending on weather conditions. Constructed of tough ABS plastic. Big and clear LCD display, 4 lines text, 1024 x 64 pixel graphic Unlimited site codes 11 sets of time zones Different time zone for each user Up to 120 holiday schedules Auto-show work status (set via time zone edit) Master cards range assignable RS-485 support for networking (via controller or directly) Built-in door sensing and arming inputs (on/off) Auto open/close scheduling of doors Control mode, card capacity and card type assignable by user directly Built-in proximity reader and external Wiegand reader port Auto-discriminating between stand-alone & networking system Alarm function available (tamper, force entrance, door sense) Networking: RS-485, 9600, N, 8, 1 External reader port: Suitable for all WG, ABA reader, 125K, 13.56M (Mifare) or 2.4G reader RF Frequency / Reading range 125 kHz / 10-18cm Door relay: 12VDC @ 2A NO/NC/COM 0.1-600 sec. latch type Alarm relay: 12VDC @ 2A NO/NC/(jumper) 0.0-600 sec. (COM Common) DI input: Egress button / door sensor / card sensor Transistor output: Arming / door sensor / card sensor Tamper switch limit switch (form C) Serial port: supported for AI-401R016, LED display, relay board, printer ETC. (4800, N, 8, 1) Made of ABS plastic Dimensions: 127mm x 91mm x 46mm (5″ x 3.58″ x 1.81″)