Battery Operated Doorbell: This wireless doorbell is powered by 3 AAA batteries (included), requiring no electrical outlet. The receiver can be mounted on a wall using screws or placed conveniently 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 easy 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 settings (mute, low, medium, high). It includes a built-in bright LED indicator to assist individuals with hearing impairments. Long Operating Range up to 1000 ft: The doorbell delivers a strong wireless signal of up to 1000 feet in open areas and is designed to avoid interference with other household devices or neighboring systems. Easy to Install Doorbell: Simply insert 3 AAA batteries into the receiver and attach the transmitter to the door frame (remove the insulating sheet inside to activate). Avoid installing too close to metal surfaces or electronic devices such as televisions.