https://www.backstreet-surveillance.com/cctv-security-brands-manufacturers/aiphone-jk-mb.html
Aiphone JK-MB Mullion Mount Bracket for JF-DV, JO-DV, or JP-DV
Aiphone JK-MB Mullion Mount Bracket for JF-DV, JO-DV, or JP-DV
mullion mount
https://www.innerrange.com/products/user-interface/hid-20-ir
HID-20-IR | HID Hybrid Signo SIFER Mullion Mount Reader | User Interface| Inner Range
HID Hybrid Signo SIFER Mullion Mount Reader supports RFID, Bluetooth, NFC, AES-128 encrypted SIFER-P, MiFARE DESFire, and multiple credential formats for...