EK9112 Brass Surface Panel with 3021 Handset. The VIDEX EK911S is a 1-way surface-mounted audio entry kit, designed for secure and efficient access control in residential or small commercial premises. This complete solution includes a stylish entrance panel and an internal handset, providing clear two-way audio communication between visitor and occupant. Ideal for single-occupancy buildings, this kit offers a reliable and easy-to-install audio entry system backed by VIDEX’s industry-leading quality.. 1-way audio entry system, perfect for single dwellings or small offices. Surface-mounted panel for quick and tidy installation. Durable entrance panel with built-in speaker and call button. Internal handset allows clear two-way communication