For G-Style Handsets. This model has a Magnetic 1 Form C Hookswitch. Also available with mechanical hookswitch: #MON1M
3 wires to connect to your device.
The cup mounts with self-tapping screws from the rear of the panel.
If you don't have access to the rear of the panel, use our rectangular back plate #PAP7A which allows you to put four screws in from the front of the panel.