![Aiphone GT-OP2 2-Module Postal Lock Panel with Frame Aiphone GT-OP2 2-Module Postal Lock Panel with Frame](https://cdn11.bigcommerce.com/s-u3uxlvxq3h/images/stencil/400x400/products/6288/23636/GT-OP2-2__66254.1584431990.jpg?c=1)
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Aiphone GT-OP3 is a three-module panel for use with the Aiphone GT Series modular intercom system. GT-OP3 has a panel with an opening for a lock provided by the post office and a blank panel for securely holding the door release circuitry. It also has an empty panel for inserting another GT Series module to build the intercom you desire. The three-module panel comes with a frame.