Telephone Call Button 802.11 b/g/n

Emergency Telephone Color Silver Includes 12-Button Braille Keypad Call Button Emergency Push Button Material Stainless Steel Mounting Location Surface Operating Voltage 24V DC Product Type Emergency Call Boxes Features These Wi-Fi VoIP Flush Mount Telephones are Designed to Provide Direct Point-To-Point Communication these Telephones Will Operate from an External Dc Power Source which is the Only Wiring Required for Operation Maximum Operating Temperature 131 Degrees F