This Wiegand proximity access card reader is easy to install and is perfect for office buildings and anywhere else you need an indoor card reader. Maximum distance is approx. 8cm (3.5 inches). Constructed of tough ABS plastic. Wiegand proximity card reader Low profile design Red/Green LED Buzzer Standalone or network operation when used with ACC900/ACC950/ACC995/ACC1000. Network interface: WG 26/34, ABAII, ASYNC 9600, N, 8, 1 Available ports: tamper switch, Wiegand port Card users: 1024 w/card and PIN combination 65,536 w/card only Anti-pass back: multi-door when used with ACC1000 Remote operation supported when used with ACC1000 Wiegand port: 1 (WG26, WG34) Request to exit supported Reader range 8cm (3.5 inches) DI inputs: egress button, door contact, arming switch Made of ABS plastic Power: 9-18VDC variable auto detection, 1W Temperature/humidity: -10°C – 50°C (14°F – 122°F) @ 0-90% relative humidity non-condensing Dimensions: 80mm x 43mm x 15mm (3.15″ x 1.69″ x .59″)