The Plug In Night Light Door Chime features a dusk to dawn sensor ensuring the night light will automatically turn on only during hours of darkness, using a soft white LED light. With an impressive range of up to 120 meters, you can place the chime unit anywhere in your house where it is most needed, using any 13A socket.The bell push is water resistant, and when pushed the chime unit will display a blue flashing light. If the night light is active this will switch to flash blue for the alert. As well as 8 different chime sounds to choose from, you can also select one of three different operating modes: chime sound only, flashing blue light only, or both together.