No electricity or batteries are needed—as your door opens, the magnet and contact disc are separated, sounding a mechanical chime. The chime can be deactivated.

Arm and disarm these alarms with a programmable code. They sound an alarm when a door is opened without authorization and the alarm and magnetic contact are separated.

An optional exterior keypad (sold separately) allows the alarm to be armed and disarmed from the outside.

Attract more attention with a strobe light as well as an audible alarm. Arm and disarm these alarms with a key. They sound an alarm and emit short, intense bursts of light when a door is opened without authorization and the alarm and magnetic contact are separated. All require a mortise lock cylinder (sold separately) for operation.

Mount an optional rim lock cylinder (not included) on the opposite side of the door to arm and disarm these alarms from the outside.

Arm and disarm these alarms with a key. They sound an alarm when a door is opened without authorization and the alarm and magnetic contact are separated. All require a mortise lock cylinder (sold separately) for operation.

Mount an optional rim lock cylinder (not included) on the opposite side of the door to arm and disarm these alarms from the outside.

Wire these receivers directly to your automatic overhead door openers for their power supply. They are for indoor use.

Also known as jackshafts, these openers operate 24-ga. or thinner overhead doors. The opener will stop and reverse the door's downward motion if it encounters an obstruction when closing or the light beam between the opener's light beam sensing switches is interrupted. During a power failure, use the manual chain hoist to move the door. All of these openers meet UL 325 safety standards for door operators and systems.

When facing the side of the door with the opener, a right-side mount opener is located on the right side of the door, left-side mount is on the left. An optional remote transmitter is sold separately.

Replace existing transmitters or team a transmitter and a receiver (not included) to remotely operate your automatic overhead door openers.

Universal transmitters are compatible with Chamberlain, Craftsman, Genie, Liftmaster, Multicode, and Stanley openers. They can operate two door openers.

DIP-switch transmitters are compatible with Liftmaster openers that have a DIP-switch receiver. Use them to operate a single door. The three-button model has open, close, and stop functions.

Rolling-code transmitters are compatible with Liftmaster openers that have Security+ 2.0 technology, which sends a new code with each use. The three-button model can operate three door openers. The four-button model is like two remotes in one—it's designed to operate one gated entrance plus three door openers.

If you don't have your remote, you can still open and close automatic overhead doors with a private 4-digit PIN. Use these transmitters to operate one transmitter or receiver. The keypad is backlit for visibility in the dark.

Conveniently carry your transmitter with your keys to remotely operate automatic overhead door openers. These transmitters are for Liftmaster openers that have Security+ 2.0 rolling code technology, which sends a new code with each use. They can operate three door openers.

For use with doors that already have a closer, these holders keep doors open with an electromagnet. When activated by a fire alarm, the magnet shuts off and releases the door. Wire these holders directly into your fire alarm system. All are reversible for right or left door-swing directions.

Mount the wall plate in an electrical outlet box or use a surface-mount box (sold separately).