Trisonic Wireless Digital Door Chime Completely Wireless 300 ft. 36 Musical Melodies Wireless Battery Operated And Powered Door Bell Musical Melodies Chime With LED Light Indicator ! This battery operated and powered door bell can range up to 300 Ft. It requires absolutely no wiring and is easy to use and install. Receiver has and LED indicator light for convenience. The ultra long distance remote control meets the need of various buildings and installations.