Status Wireless Plug in Door Chime. Easy to install with no wiring required. Simply plug door chime into an electrical outlet, ensuring that the bell push is still with in range. Up to 150 metre operating range (unobstructed), 32 Selectable melodies, (24 polyphonic, 8 monophonic) Uses self learning technology, with 1 million running codes to prevent operating interference. Waterproof bell push. 1 x CR2032 Battery included.