Wire free. plug-in. strobe flash light. 100m distance. Turn off the sound and use the flashing strobe light to alert you that you have a visitor. Weatherproof bell push. 100 meters distance. Size: 120mm x 26mm x 68mm. Sound: 8 chimes. Power: 240 volt mains. Transmitter batteries included. 8 sounds: 2008 big ben. 2008 clarinet. 2008 morning dew. 2008 saxophone. 2008 solo. 2008 tubular 2-notes. 2008 tubular 3-notes. 2008 tubular scale.