Feature: 1. Durable Material: Strong acrylic material combines with wear resistance, cold and sun protection, to provide the best protection for your doorbell to extend its service life. 2. Protection: Reduce glare from the sun or street lights when operation to access, and can easily cope with rain, snow and any other weather conditions. 3. Important Diameter: The thickness inside is about 40mm/1.57in, the internal size is approximate 230 x 130 x 80mm, and the external size is about 244 x 143 x 83mm. 4. Simple installation: Support adhesive or screw installation (not included), please measure the size of the position before, and then install the device in the cover. 5. Application: The large internal space makes it easy to install a variety of access control and doorbells that are commonly found which meet the dimensions requirement. Specification: Item Type: Doorbell CoverMaterial: AcrylicThickness Inside: Approx. 40mm/1.57in Internal Size: Approx. 230 x 130 x 80mm/9.06 x 5.12 x 3.15in External Size: Approx. 244 x 143 x 83mm/9.61 x 5.63 x 3.27inApplication:Suitable for Access control, doorbell. Package List: 1 x Waterproof Cover