Battery Operated Doorbell: This wireless doorbell is powered by 3 AAA batteries (included), requiring no electrical outlet. The receiver can be wall-mounted with screws or placed easily 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 wireless doorbell operation. With IP44-rated dustproof and waterproof protection, it offers high sensitivity and low power consumption. The push button can be installed both indoors and outdoors. Flashing Light Doorbell: This wireless doorbell features 36 melodies and 4 volume levels (mute, low, medium, high). It includes a built-in large 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 other household devices or neighboring systems. Easy to Install Doorbell: Insert 3 AAA batteries into the receiver and mount the transmitter (remove the insulating sheet inside) on the door frame. Avoid installing near metal surfaces or electronic devices such as televisions.