SPECIFICATIONS:-POWER SUPPLY: 9 VAC / 60 Hz (adapter and phone cable included) -OUTPUTS: Universal relay output 5 A @ 30 VAC inductive P.F. 0.4, 10 A @ 30 VAC resistive, 10 A @ 120 / 240 VAC resistive (electrical box required) -DIMENSIONS (H•W•D): 69 x 137 x 31 mm / 2.7 x 5.4 x 1.2 inches FEATURES: -Universal outputs (4) work with thermostats and household devices operating with dry contacts -Connects directly to existing phone line -Activated by home / cell phones and is compatible with answering machines -One-touch buttons enable manual override of controller output status -LEDs show output status -Programming ring setting enable user to select number of rings (1 to 9) before controller answers -Battery-free backup saves user settings and output status after a power outage -Password-protected for secure access