Advanced Materials: Worried about doorbell batteries overheating? Our all-weather cold-rolled steel doorbell covers are your solution. With thermal insulation and resistance to warping, fading and cracking, it is a smart and reliable choice for long-lasting protection. [Versatility]: The round doorbell weatherproof protector is 3.5 inches wide and compatible with most doorbells, camera doorbells, access control devices, door RFID keyboards, etc. [Anti-glare protection]: Our visual doorbell rain cover performs well in terms of water resistance, sun protection, wind resistance and anti-glare. the sun and street glare and enjoy uninterrupted video clarity day and night. [Please note]: Compared to other of doorbell covers, our doorbell covers are and larger at the top and on all sides, providing excellent water resistance and protection. Please note before purchasing that the side may be partially obscured due to side magnification. Colour:Black Material:Metal Package Contents: 2 x metal doorbell rain covers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.