Viking 3 Output Controller - Heavy Duty Power Management for Home & Industrial Use | Reliable Multi-Circuit Control for Appliances, HVAC & Lighting Systems

-User touch tone programmableNon-volatile E² memory12 digit alarm activated pulse dialer6 digit security code (to access programming)6 digit access code (disable or enable for additioal control security)Switchable 12V talk batteryRelay interrogation tonesProgrammable relay time delaysCascade up to three RC-3's to control up to nine relaysProgrammable ring delay before answeringStatus LED's for relays 1 2 3 and the answer relayOne power adaptor can power up to three units