Battery Operated Doorbell: This wireless doorbell is powered by 3 AAA batteries (included), requiring no electrical outlet. The receiver can be mounted on the wall using screws or placed on a desk. It is portable and suitable for use in areas such as the backyard, basement, garage, or bedroom. Wireless Doorbell with Touch Button: The touch button is designed for indoor and outdoor use. It features IP44-rated protection against dust and water, offering high sensitivity and low power consumption. Flashing Light Doorbell: This wireless doorbell offers 36 melodies and 4 volume settings (mute, low, medium, high). It includes a built-in LED indicator to assist individuals with hearing impairments. Long Operating Range up to 1000ft: The wireless signal reaches up to 1000 feet in open areas and is designed to avoid interference with household electronics or neighboring devices. Easy to Install Doorbell: Install 3 AAA batteries into the receiver and insert the transmitter (remove the insulating sheet) near the door frame. Avoid installing near metal surfaces or electronic devices such as televisions.