Cona Galaxy Ding Dong Bell tested up to 275V the ding dong bell is made from special thick aluminum Patti for a clear and loud sweet sound. Heavy parts and good quality copper coil is used for long life of the product thus this door bell will never let you down. Ding Dong Bell is 100% safe with unique design stands out and the quality says everything from easy installation to proper functioning of a product Item Dimension: 88mm x 45mm x 160mm the door bell has a smooth glossy finish that will match to your interior design. The doorbell can be used at house, offices, commercial areas, industrial area, buildings, storehouse, etc.