Alarm.com-- Video Doorbell Mounting Wall Plate Universal (ADC-VDBA-WP-U) . Supports Alarm.com 770, Slim I and Slim II, and Alarm.com 750 Doorbells.Alarm.com Video Doorbell Mounting Wall Plate Universal (ADC-VDBA-WP-U)SKU: SKU 78799$9.99PriceQuantityAdd to Cart