The 2157 Series lobby panels are designed for indoor use.
Type: Hands free loud speaking Capacity: 4- 18 push buttons in groups of 2 Material: Extruded anodized aluminum. Speaker and mic protected by perforated screen and grill. Mounting: Recess mounted to BB91 back box Dim: 14”H x 4 “ W x 2 3/8” D Surface mounted: BB92 back box required Dim: 15”H x 5 “ W x 2 3/8” D Electrical: Screw type terminal push buttons are replaceable from the back. Options: Not available with postal door release
