How to Install a Stealth Alarm

Open the front door of your home. Place a sensor plate against the bottom edge of the door. Screw wood screws through the plate and into the door, using a Phillips screwdriver.

Place a sensor-receiving plate against the bottom inside edge of the door frame. Screw wood screws through the plate and into the door frame, using a Phillips screwdriver.

Turn the wireless transmitter that is wired to the sensor-receiving plate so that the back faces you. Remove the screw over the battery compartment lid with a Phillips jeweler's screwdriver. Ignore this step if there is no screw.

Open the lid of the wireless transmitter and insert compatible batteries into the battery compartment. Close the lid and reattach the screw, if there is one.

Turn the wireless transmitter so that the front is facing you. Place the transmitter against the bottom of the wall next to the door frame, above the baseboard. Screw the transmitter to the wall with wood screws, using the Phillips screwdriver. Close the door.

Remove the plug at the end of the telephone's phone cord from the socket in the telephone wall plate. Insert the plug at one end of a separate telephone cord into the wall socket.

Place the telephone dialer, which has a wireless receiver built into it, next to the telephone. Plug the telephone dialer's power cord into a wall outlet. Insert the plug at the end of the separate telephone cord into the "Tel in" socket on the telephone dialer. Insert the plug at the end of the telephone cord attached to the telephone into the "Tel out" socket on the telephone dialer.

Turn the telephone dialer over. Open the battery compartment lid, if there is one, and insert a compatible battery or batteries for backup use. Close the lid and turn the telephone dialer over.

Follow the instructions provided with the telephone dialer to set up a password for the menus. Enter the password to access the menus. Enter a telephone number that the telephone dialer will call if the alarm goes off. Enter a recorded message, using the built-in microphone and recording memory, that will be played to whoever picks up the phone. Enter the password again to arm the alarm.