Manufacturer Security Door Controls Model 928 Dimensions 3W x 5H x 3D Operating Temperature -20F to + 130F (-30C to + 54C) Memory The EEPROM memory retains all entry codes and programming during a power failure Programming Keypad programmable Auxiliary Outputs 4 independent outputs Number of Users 480 Users Voltage Input 12 or 24 VAC/VDC Warranty 1 Year Warranty Weight 1.0000