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Do I need an electrician/contractor to do the wiring?

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No. The Open Sesame is a low voltage device. A 24vac transformer plugs into the wall to keep the internal battery charged. It can be installed easily and safely by anyone with handyman skills.

Remote Control Batteries

The batteries used in our transmitters are shown below. They can be obtained at your local drug stores.
2-button transmitter
4-button transmitter
Replacement Battery = 12v 23A
keyless entry push pad
large wireless wall push pad commercial door opener
narrow wireless wall push pad
vertical push pad
Replacement Battery = 9v
push button door opener keychain transmitter
Replacement Batteries (2) =
3v 2016
push button door opener wireless wall touch pad
Replacement Battery =
3v CR123