Built-in 125KHz 26-bit Wiegand proximity card reader with LED and beep card read confirmation K-1770-3-EWP is designed to meet IP66 Ingress Protection Rating (see DOD# 859 for more information) Available in 2 standard faceplate finishes: 316 brushed stainless steel or oil rubbed bronze Frequency: 125KHz Format: 26 bit Wiegand Read Range: 1.25 to 2.0 Technologies Supported: Viking PRX-C, PRX-C-ISO, PRX-FOB and certain legacy HID proximity protocols* (* HID and the HID logo are registered trademarks of HID Global Corporation, an ASSA ABLOY company. All other trademarks are the property of their respective owners.) Transducer: Beeps during card read LED: Red, turns off during card read Humidity: Up to 100% (fully potted EWP) Operating Temperature: -34 C to 65 C (-30 F to 150 F) Blue in use LED Telephone line powered Volume adjustments for microphone and speaker Advanced call progress detection: disconnects on busy signal, return to dial tone, CPC, reorder tone, maximum call time out and 40 second silence time out Selectable auto-answer feature for monitoring