General description This Waterproof Metal Cover is designed to provide full weather protection for intercoms, videophones, and doorbells. Made from high-quality cold-rolled metal, it offers excellent waterproof, explosion-proof, and sun-proof capabilities, ensuring your devices are well-protected and extending their service life. Technical specifications Material: Cold Rolled Steel Color: Black Product Dimensions: 3.5 x 5 x 2 inches Internal Dimensions: Length: 143mm, Width: 106mm, Height: 100mm Narrow Side Height: 74mm External Dimensions: Length: 160mm, Width: 134mm, Height: 100mm Operating Temperature Range: -20°C to 50°C Compatibility and accessories Compatible with all brand keypads and doorbells of the same size Suitable for various devices including fingerprint devices, access control keypads, and attendance machines Installation Installation Method 1: Use screws provided with the product and a screwdriver to secure it in place Installation Method 2: Use glue or adhesive to