- User touch tone programmable- Non-volatile E memory- 12 digit alarm activated pulse dialer- 6 digit security code (to access programming)- 6 digit access code (disable or enable for additioal control security)- Switchable 12V talk battery- Relay interrogation tones- Programmable relay time delays- Cascade up to three RC-3 s to control up to nine relays- Programmable ring delay before answering- Status LED s for relays 1, 2, 3 and the answer relay- One power adaptor can power up to three units