PUSHBUTTON DOORBELL: Pushbutton doorbell with a U.V. Inhibitor touch pad surface that won't yellow in the sun and non-stick action for years of quality use CLASSIC STYLE: Circular-shaped doorbell with a satin nickel finish is perfect for greeting your guests LIGHT INCLUDED: Lighted pushbutton provides visibility after dark so visitors are never left searching for the doorbell DURABLE: Weather-resistant finish provides years of dependable, high-quality service EASY INSTALLATION: Surface mount design fits brick ing, allowing flexibility of surface installation choices for your convenience Frequency (Hz): 60