Manufacturer iEi Electronics / Linear Model 2000e – 0-294021 Dimensions 4.50 W x 2.75 H x 0.60 D Memory Non-volatile EEPROM memory means your codes and instructions will be there whether you remove power for 5 minutes or 5 years. Programming All programming is done entirely from the front of the keypad. LED or sounder guidance makes programming easy. It takes seconds for an authorized user to change codes. Output Mode Output Expansion Module (2000-8EX) 8 additional outputs for elevator and other applications Number of Users Up to 500 Voltage Input 10-30 VDC & 12-24 VAC Warranty Five Year Warranty Weight 1.0000